By the time four H1N1 vaccination clinics opened at 10 a.m. yesterday, Allegheny County Health Department officials already were nervous, even scared. (Today)

Only about a quarter of the at-risk population statewide has received the H1N1 vaccine, meaning it will be a while before the flu vaccine becomes available for everyone else. (Yesterday)

Students from Midland, Beaver County, star in a new music video the state Department of Health has developed to teach kids ages 6 to 12 how they can prevent getting or spreading the H1N1 flu virus. (Yesterday)

RALEIGH, N.C. -- A cluster of four Tamiflu-resistant cases of H1N1 flu at Duke University Medical Center have raised concerns that changes in the virus may make severe infections more difficult to treat. (Yesterday)

In the past several weeks, as the H1N1 flu has swept through the nation, questions have been raised about how Pennsylvania chose to handle the process of distributing the limited doses of vaccine. (11/20/2009)