No abstract available.
Respiratory Syncytial Virus Infections* ; Respiratory Syncytial Viruses*

Lower respiratory tract infection (LRTI) induced by respiratory syncytial virus (RSV) is an important cause of hospitalization for infants. Compared with adults, infants are more likely to cause serious respiratory diseases after RSV infection due to the specific immature airway structure and immune system. The balance of immune resistance and immune tolerance of the host is critical to effective virus clearance and disease control. This paper reviews the relationship between RSV infection and respiratory diseases in infancy, the influence factors of the high pathogenicity of RSV infection in early life, as well as the research progress of anti-RSV therapy, and expands the specific molecular events regulating immune resistance and immune tolerance. We expect to present new ideas for the prevention and treatment of RSV-related respiratory diseases in clinical practice.
Humans ; Infant ; Respiration Disorders ; Respiratory Syncytial Virus Infections ; Respiratory Syncytial Viruses ; Respiratory Tract Infections

Human respiratory syncytial virus (RSV) is the leading cause of severe lower respiratory tract infection, such as bronchiolitis, bronchitis, or pneumonia, in both infants and the elderly. Despite the global burden of diseases attributable to RSV infection, no clinically approved vaccine is available, and a humanized monoclonal antibody for prophylaxis is not readily affordable in developing countries. There are several hurdles to the successful development of RSV vaccines: immune-vulnerable target populations such as premature infants, pregnant women, and immunocompromised people; safety concerns associated with vaccine-enhanced diseases; repeated infection; and waning memory. To develop successful strategies for the prevention of RSV infection, it is necessary to understand the protective and pathologic roles of host immune responses to RSV infection. In this review, we will summarize the positive and negative relationship between RSV infection and host immunity and discuss strategies for the development of the first successful RSV vaccine.
Humans ; Immunity ; Immunocompromised Host ; Respiratory Syncytial Virus Infections/immunology/*prevention & control ; *Respiratory Syncytial Virus Vaccines ; Respiratory Syncytial Viruses/*physiology

Child ; Humans ; Respiratory Syncytial Virus Infections ; immunology ; virology ; Respiratory Syncytial Virus, Human ; immunology ; pathogenicity

Humans ; Molecular Epidemiology ; Respiratory Syncytial Virus Infections ; epidemiology ; virology ; Respiratory Syncytial Virus, Human ; genetics

Human Respiratory Syncytial Virus (HRSV) is a serious threat to the population health. The elderly are one of the susceptible populations. The prevalence of HRSV in the elderly is generally higher than that in other age groups except children, which has gradually attracted attention in recent years. This paper reviewed the prevalence, common complications and major complications of HRSV in the elderly, briefly expounded the economic burden of HRSV infection, and proposed that attention should be paid to the disease burden of the elderly after HRSV infection, timely treat common complications, so as to reduce the occurrence of adverse survival outcomes and provide scientific evidence for the prevention and control of HRSV infection in the elderly.
Child ; Humans ; Aged ; Respiratory Syncytial Virus Infections/epidemiology* ; Respiratory Syncytial Virus, Human

Human respiratory syncytial virus (HRSV) is one of the main pathogen causing severe acute lower respiratory tract infections in infants and the elderly, with high incidence rate and mortality worldwide. Vaccine is one of the important measure to prevent infection, transmission and severe disease of HRSV, but currently there is no officially approved preventive vaccine for prevention of HRSV in the world. This paper reviews and analyzes the current research and development progress of HRSV vaccine, summarizes the design routes of different types of HRSV preventive vaccines, and discusses the difficulties and challenges in vaccine research and development, in order to provide reference for the research and development of HRSV vaccine and the development of clinical trials.
Infant ; Humans ; Aged ; Respiratory Syncytial Virus, Human ; Respiratory Syncytial Virus Infections/epidemiology* ; Respiratory Syncytial Virus Vaccines/therapeutic use* ; Respiratory Tract Infections

Humans ; Respiratory Syncytial Virus Infections ; prevention & control ; therapy ; Respiratory Syncytial Viruses

Humans ; Child ; Respiratory Syncytial Virus Infections/prevention & control*

Respiratory syncytial virus is the most common cause of lower respiratory infection (bronchiolitis and pneumonia) of infancy and early childhood. We analyzed clinical and radiological features of 76 patients with lower respiratory infections by respiratory syncytial virus, which were diagnosed by indirect immunofluorescent test or culture of nasal aspirate in Hep-2 cell monolayer, during the period of January-December, 1991. There were peaks of incidences in March-May and November-December, accounting for 87% of eases. Sixty-two cases (82%) were under 1 year of age. Fifty cases(66%) had underlying diseases. Major radiographical findings were overaeration (83%), parahilar peribronchial infiltrates(67%), segmental or subsegmental atelectasis(32%), and segmental or lobar consolidation(16%). In 15 cases(20%), overaeration was the only radiological findings. There was no evidence of pleural effusion or hilar lymph node enlargement in all cases. By considerig clinical features(symptoms, age. Underlying diseases, epidemic seasons) in addition to the radiological findings, radiologists would be familiar with lower respiratory infection by respiratory syncytial virus. Air space consolidation, which is generally though to represent bacterial pneumonia, is also observed not infrequently in respiratory syncytial virus infections.
Child* ; Humans ; Incidence ; Infant* ; Lymph Nodes ; Pleural Effusion ; Pneumonia, Bacterial ; Respiratory Syncytial Virus Infections ; Respiratory Syncytial Viruses* ; Respiratory Tract Infections