Human Metapneumovirus RSV Influenza COVID-19 Whooping Cough Symptoms Mycoplasma pneumoniae Pneumonia Atypical Pneumonia Asthma Respiratory Syncytial Virus (RSV) Flu Diarrhea Multiple Infections Pertussis Transmission Prevention Parainfluenza Viruses Bronchiolitis Viral Infections Walking Pneumonia Malaria HMPV Virus MPVh Impact on Workforce