"Here we have a real-world example of how planning, prevention, coordination and public-health common sense prevailed, and these kids have a great experience to look back on."

Since spring 2009, millions of Americans have been infected with H1N1 and thousands have died, including children. In most cases Tamiflu and other antivirals help control the spread of the virus, along with frequent use of hand sanitizer and disinfectant. Other actions people should take to avoiding catching and spreading flu include covering the nose and mouth with a tissue during a cough or sneeze and throwing the tissue in the trash after use or coving coughs with the bend of an elbow.

Kimberlin said in the case of the Alabama boys' camp, a targeted approach to antiviral use in those at highest risk achieved the benefits of prevention while minimizing side-effects and reducing the chance the virus would become resistant to the drug. A majority of the 65 staff and counselors and a smaller percentage of campers experienced some antiviral-related discomfort including nausea, vomiting and headaches. None of those symptoms led anyone at the camp to stop taking antiviral treatments.