Further Reading

FURTHER READING:

 

J. Raloff. “Germs’ persistence: Nothing to sneeze at.” Science News. Nov. 29, 2011.

 

S. Ornes. “Swine flu goes global.” Science News for Kids. May 6, 2009.

 

S. Ornes. “Flu river.Science News for Kids. October 14, 2009.