Influenza (ไข้หวัดใหญ่)
Influenza is caused by an RNA virus of the orthomyxovirus group. Influenza virus is a single-stranded, helical RNA genome surrounded by an envelope made up of
protein, a lipid bilayer, and external glycoproteins. There are three different types of influenza viruses: influenza A, influenza B, and influenza C. Only influenza A is an important human pathogen