showcasing respiratory syncytial virus rsv particles

science medical respiratory syncytial virus rsv particles viral microscopic cellular structure pathogenic disease lung infection immune system bronchioles airways mucosa tissue culture fusion protein glycoproteins envelope nucleocapsid ciliated epithelial cells apical membrane vaccine development epidemiology pediatrics elderly population infants children asthma patients comorbidities coldlike symptoms bronchiolitis pneumonia diagnosis antiviral therapy prevention measures research public health