Changes

[[File:Influenzastructure.png|thumb|360px|Structure of the influenza virus.<ref name="Arti1">Host Protective Immune Responses against Influenza A Virus Infection, MDPI, 2020, Hi Eun Jung, Heung Kyu Lee, https://www.mdpi.com/1999-4915/12/5/504/htm</ref>]]