120k views
5 votes
How do flu pandemics occur?

2 Answers

2 votes

Answer:

Occurs when a new influenza virus emerges spreads and causes disease worldwide.

User Dylan Glockler
by
4.2k points
3 votes
Occurs when a new influenza virus emerges spreads and causes disease worldwide

Also occur when a host cell is simultaneously infected with two influenza A viruses
User Walking
by
3.6k points