Conversation so far:
where is the flu found in the world
Influenza originates, actually, among birds and other animals such as pigs.
what countries are involved with the strains of influenza
New viral strains of influenza come to the United States and to Europe from Southeast Asia. That's the global pattern.
how is influenza passed
We get influenza on our hands and touch each other and touch our noses, our mouths and transmit the virus from one person to another.

Question: how is the virus different
Self-contained rewrite: how is the influenza virus different from measles