OBJECTIVES: To investigate the serum level of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)-specific RBD IgG antibody (SARS-CoV-2 IgG antibody for short) in children with SARS-CoV-2 Omicron variant infection during the recovery stage, as well as the protective effect of SARS-CoV-2 vaccination against Omicron infection. METHODS: A retrospective analysis was performed on 110 children who were diagnosed with coronavirus disease 2019 (COVID-19) caused by SARS-CoV-2 Omicron variant infection in Tianjin of China from January 8 to February 7, 2022. According to the status of vaccination before diagnosis, they were divided into a booster vaccination (3 doses) group with 2 children, a complete vaccination (2 doses) group with 90 children, an incomplete vaccination (1 dose) group with 5 children, and a non-vaccination group with 13 children. The clinical data and IgG level were compared among the 4 groups. RESULTS: The complete vaccination group had a significantly higher age than the non-vaccination group at diagnosis (P<0.05), and there was a significant difference in the route of transmission between the two groups (P<0.05). There were no significant differences among the four groups in sex, clinical classification, and re-positive rate of SARS-CoV-2 nucleic acid detection (P>0.05). All 97 children were vaccinated with inactivated vaccine, among whom 85 children (88%) were vaccinated with BBIBP-CorV Sinopharm vaccine (Beijing Institute of Biological Products, Beijing, China). At 1 month after diagnosis, the booster vaccination group and the complete vaccination group had a significantly higher level of SARS-CoV-2 IgG antibody than the non-vaccination group (P<0.05), and at 2 months after diagnosis, the complete vaccination group had a significantly higher level of SARS-CoV-2 IgG antibody than the non-vaccination group (P<0.05). For the complete vaccination group, the level of SARS-CoV-2 IgG antibody at 2 months after diagnosis was significantly lower than that at 1 month after diagnosis (P<0.05). CONCLUSIONS Vaccination with inactivated SARS-CoV-2 vaccine has a protective effect against Omicron infection in children. For children vaccinated with 2 doses of the vaccine who experience Omicron infection, there may be a slight reduction in the level of SARS-CoV-2 IgG antibody at 2 months after diagnosis. Citation:Chinese Journal of Contemporary Pediatrics, 2022, 24(7): 736-741.
Antibodies, Viral ; COVID-19 ; COVID-19 Vaccines ; Child ; Humans ; Immunoglobulin G ; Retrospective Studies ; SARS-CoV-2 ; Viral Vaccines

OBJECTIVE: To study the complications of upper gastrointestinal foreign body in children and related risk factors. METHODS: Clinical data were collected from 772 children with upper gastrointestinal foreign bodies who were treated at the outpatient service or were hospitalized from January 2014 to December 2018. A multivariate logistic regression analysis was used to investigate the risk factors for the development of complications in children with upper gastrointestinal foreign bodies. RESILTS: The upper gastrointestinal foreign bodies were taken out by electronic endoscopy for the 772 children. There were 414 boys and 358 girls, with a median age of 2.8 years. Children under 3 years old accounted for 59.5%. The foreign bodies were mainly observed in the esophagus (57.5%) and the stomach (28.9%), with a retention time of ≤24 hours in 465 children (60.2%) and >24 hours in 307 children (39.8%). The types of upper gastrointestinal foreign bodies mainly included round metal foreign bodies (37.2%), long foreign bodies (24.7%), sharp foreign bodies (16.2%), batteries (14.4%), corrosive substances (4.8%), and magnets (2.7%). As for the severity of complications, 47.7% (368 children) had mild complications, 12.7% (98 children) had serious complications, and 39.6% (306 children) had no complications. The logistic regression analysis showed that an age of <3 years, underlying diseases, location of foreign body, type of foreign body, and a retention time of >24 hours were risk factors for the development of complications in these children (OR=2.141, 7.373, 6.658, 8.892, and 6.376 respectively, P<0.05). CONCLUSIONS An understanding of the above high-risk factors for the complications of upper gastrointestinal foreign bodies is helpful to choose appropriate intervention methods and thus reduce the incidence of serious complications.
Child, Preschool ; Endoscopy, Gastrointestinal ; Esophagus ; Female ; Foreign Bodies ; Humans ; Male ; Retrospective Studies ; Risk Factors ; Upper Gastrointestinal Tract

Objective: To investigate frailty progress status and related factors in the elderly living in communities. Methods: A cohort of elderly people aged 65 and over in Pingyi community of Dujiangyan, Sichuan province, was established. Face-to-face questionnaire survey was conducted by trained interviewers. The frailty status, cognitive function, nutrition status and other functions of the subjects surveyed were evaluated at baseline survey and during follow-up. The socio-demographic and clinical characteristics of the subjects surveyed were assessed at baseline survey. Binary logistic regressions were used to identify factors associated with frailty progress. Results: A total of 653 elderly people were surveyed in January 2014, and 507 elderly people were followed up while 146 elderly people terminated further follow-up in January 2017. The prevalence rates of frailty and pre-frailty at baseline survey were 11.2% (n=57) and 26.2% (n=133), respectively. After 3 years, 205 subjects (40.4%) surveyed experienced frailty progress, 276 (54.5%) remained to be in frailty state at baseline survey, and 26 (5.1%) had improvement. Disability (OR=8.27, 95%CI: 1.62-42.26), visual problem (OR=2.02, 95%CI: 1.27-3.22), cognitive impairment (OR=1.94, 95%CI: 1.08-3.48), poor self-rated health (OR=1.89, 95%CI: 1.07-3.31), chronic pain (OR=1.57, 95%CI: 1.03-2.40) and older age (OR=1.12, 95%CI: 1.08-1.17) were independently associated with the progress of frailty. In contract, overweight was a protective factor (OR=0.54, 95%CI: 0.34-0.85). Conclusions: Frailty is a dynamic syndrome affected by several socio-demographic factors and geriatric factors. The results of the study can be used in the prevention of frailty progress in the elderly in communities.
Aged ; Aged, 80 and over ; China/epidemiology* ; Frail Elderly/statistics & numerical data* ; Frailty ; Geriatric Assessment/statistics & numerical data* ; Humans ; Prospective Studies ; Quality of Life/psychology* ; Surveys and Questionnaires

Family-based cohort study is a special type of study design, in which biological samples and environmental exposure information of the member in a family are collected and related follow up is conducted. Family-based cohort study can be applied to explore the effect of genetic factors, environmental factors, gene-gene interaction, and gene-environment interaction in the etiology of complex diseases. This paper summarizes the objectives, methods and results, as well as the opportunities and challenges of the family-based cohort study on common chronic non-communicable diseases in rural population in northern China.
China/epidemiology* ; Chronic Disease/ethnology* ; Cohort Studies ; Female ; Gene-Environment Interaction ; Humans ; Male ; Middle Aged ; Noncommunicable Diseases/ethnology* ; Research Design ; Rural Population

Objective: To understand the etiological characteristics of bacterial diarrhea in different areas, including large cities, mid-sized/small cities and rural area, in China. Methods: A cross-sectional surveillance was conducted in 17 provinces of China from 2010 to 2014. The acute diarrhea outpatients were selected from clinics or hospitals in large cities, mid-sized/small cities, including rural-urban fringe zones, and rural areas. The demographical and clinical characteristics of the patients were collected by using questionnaire, and stool samples were taken from them for laboratory detection of 17 kinds of bacteria. The differences in pathogen positive rates (PPR) and pathogen spectrum across the cases from three-type areas were compared. The different infection risk in different cases were analyzed with unconditional logistic regression model. Results: In our study, we enrolled 9 253 cases from large cities, 5 138 cases from rural areas and 13 683 cases from midsized/small cites. The pathogen with largest differences in infection rate across the three-type areas was Shigella (S.) flexneri (rural area: 5.81%, mid-sized/small city: 2.78%, large city: 0.46%), followed by Aeromonas (A.) hydrophila (rural area: 2.14%, mid-sized/small city: 0.96%, large city: 0.48%). Compared with cases in large cities, the cases in mid-sized/small cities and rural areas had higher infection risks for S. flexneri (mid-sized/small city: OR=6.481, 95%CI: 4.666-9.002, rural area: OR=11.304, 95%CI: 8.018-15.938) and A. hydrophila (mid-sized/small city: OR=1.992, 95%CI:1.401-2.832, rural area: OR=4.083, 95%CI: 2.833-5.884). The constituent ratio of diarrheagenic Escherichia coli and Salmonella increased with the urbanization development, while the ratios of Shigella and A. hydrophila had an opposite trend. S. sonnei (60.00%) was the predominant serogroup of Shigella in urban infections, while S. flexneri (77.37%) was the predominant serogroup in rural infections. Conclusion: The differences in pathogen spectrum of bacterial diarrhea were obvious across large cities, mid-sized/small cities and rural areas in China, especially the differences in the infection rates of S. flexneri and A. hydrophila.
Adolescent ; Adult ; Bacterial Infections/microbiology* ; Child ; China/epidemiology* ; Cross-Sectional Studies ; Diarrhea/microbiology* ; Dysentery/epidemiology* ; Escherichia coli/pathogenicity* ; Feces/virology* ; Female ; Humans ; Male ; Middle Aged ; Prevalence ; Rural Population ; Salmonella/pathogenicity* ; Shigella/pathogenicity* ; Suburban Population ; Urban Population

Objective: To identify the spatial clustering and its temporal trends among newly detected female HIV/AIDS cases aged 15 years or older, in China from 2010 to 2016. Methods: Newly detected HIV/AIDS cases among aged 15 years or older women in China during 2010-2016 were collected, to describe their demographic characteristics, changing trends and spatial autocorrelation. This program was conducted at county level, using the ArcGIS 10.3. Results: The number of newly detected HIV/AIDS cases among aged 15 years or older women was increasing annually from 16 603 to 26 196 in 2010 and in 2016. As the main route proportion of heterosexual transmission increased from 84.25% (13 988/16 603) in 2010 to 96.29%(25 224/26 196) in 2016. Both the number and proportion of HIV/AIDS cases among elderly women ≥50 years of age increased significantly from 17.82%(2 959/16 603) to 38.10%(9 981/26 196) in 2016. Results from spatial analysis demonstrated a county-level clustered distribution of HIV/AIDS cases across the country with a rising global Moran's I value=0.55 over the years (Z=51.46, P<0.001), which was concentrating on western and southern China, covering 9 provinces/autonomous regions/municipalities (Yunnan, Guangxi, Sichuan, Xinjiang, Guizhou, Guangdong, Chongqing, Henan and Hunan). The temporal trends of hot spots differed by age groups, with the trend of epidemic shifting towards western border and southern coastal regions among women aged 15-49 years old, while the elderly women aged ≥50 years old were spreading northward from the southwestern regions. Conclusion: Our findings indicated that an increasing trend of clusters appeared on HIV epidemic among newly detected female HIV/AIDS cases aged 15 years or older in China, particularly in the western and southern regions. Prevention and intervention strategies should target on women according to their age distribution, particularly in regions with increasing trend of HIV epidemics.
Adolescent ; Adult ; Age Distribution ; Aged ; China/epidemiology* ; Epidemics ; Female ; HIV Infections/ethnology* ; Humans ; Middle Aged ; Spatial Analysis ; Young Adult

Objective: To explore the relationship between frailty syndrome and falls in the elderly diabetics, in the communities. Methods: A three-year cohort study involving 653 community-dwelling adults who were over 65 years of age and participated in the Survey of Disease, Psychological and Social Needs in Dujiangyan Pingyi Community. Diabetic patients would include those who self-reported as having histories of diabetes or on anti-hyperglycemic therapies. Frailty, functional and other geriatric status were assessed respectively. Falls was defined as having had multiple falls or at least one event but with injury. Results: The highest prevalence of falls was found in the group of frail diabetic group (62.5%). Data showed that baseline frailty was associated with falls in both diabetic and non-diabetic groups but the odds ratio in the diabetic group was higher than that of the non-diabetic group (OR=3.87, 95%CI: 1.45-10.28 vs. OR=6.68, 95%CI: 1.14-38.99). Conclusion: Frailty could be used as a strong clinical predictor to prevent falls, for the elderly diabetic Chinese living in the communities.
Accidental Falls/statistics & numerical data* ; Aged ; Cohort Studies ; Frail Elderly/statistics & numerical data* ; Frailty/epidemiology* ; Geriatric Assessment/methods* ; Humans ; Independent Living ; Odds Ratio ; Prevalence ; Prospective Studies ; Risk Assessment/methods* ; Surveys and Questionnaires ; Syndrome

Five influenza pandemics had occurred during the past century (1918 "Spanish flu" , 1957 "Asian flu" , 1968 "Hong Kong flu" , 1977 "Russian flu" and 2009 H1N1 Pandemic), accounting for hundreds of millions of people infected and tens of millions dead. China was influenced by all the five pandemics, and three of them (1957 "Asian flu" , 1968 "Hong Kong flu" and 1977 "Russian flu" ) were originated from China. The pandemics triggered the establishment of public health agencies and influenza surveillance capacities. In addition, more resources were allocated to influenza-related research, prevention and control. As a leader in the field of influenza, China should further strengthen its pandemic preparedness and response to contribute to global health.
Asian People ; China/epidemiology* ; Disease Outbreaks/history* ; History, 20th Century ; History, 21st Century ; Hong Kong ; Humans ; Influenza A Virus, H1N1 Subtype ; Influenza, Human/history* ; Pandemics/history* ; Public Health

Influenza can be prevented through annual appropriate vaccination against the virus concerned. In China, influenza vaccine is categorized as "Class Ⅱ" infectious diseases which the cost is paid out of the user's pockets. The annual coverage of influenza vaccination had been 2%-3%. The main reasons for the low coverage would include the following factors: lacking awareness on both the disease and vaccine, poor accessibility of vaccination service, and the cost of vaccination. To reduce the health and economic burden associated with influenza, comprehensive policies should be improved, targeting the coverage of seasonal influenza vaccination. These items would include: ① Different financing reimbursement schemes and mechanisms to improve the aspiration on vaccination and on the vaccine coverage in high-risk groups, as young children, elderly, people with underlying medical conditions; ② to ameliorate equality of vaccination services; ③ to improve knowledge of the health care workers (HCWs) and the public on influenza and related vaccines; ④ to improve clinical and preventive medical practice and vaccination among HCWs through revising clinical guidelines, pathway and consensus of experts; ⑤ to provide more convenient, accessible and normative vaccination service system; ⑥ to strengthen research and development as well as marketing on novel influenza vaccines; ⑦ to revise items regarding the contraindication for influenza vaccine on pregnancy women, stated in the Chinese Pharmacopoeia.
Aged ; Awareness ; Child ; China ; Costs and Cost Analysis ; Female ; Health Knowledge, Attitudes, Practice ; Health Personnel ; Health Promotion/methods* ; Humans ; Influenza Vaccines/economics* ; Influenza, Human/prevention & control* ; Male ; Pregnancy ; Vaccination

Based on the characteristics of influenza occurred in 2017 and 2018, we discussed the current development and update on the etiology, mechanism, clinical characteristics, laboratory examination, treatment and prevention for influenza in children, in order to draw attention on the awareness and capacity in prevention and treatment programs targeting child influenza among physicians and health workers.
Awareness ; Child ; Communicable Disease Control ; Health Personnel/psychology* ; Humans ; Influenza Vaccines ; Influenza, Human/prevention & control* ; Physicians/psychology*