May 7, 2013 With the new H7N9 virus spreading through China and H5N1 popping up every now and then in Southeast Asia, it's tough to keep track of all the flu viruses. Here's a quick guide to what those H's and N's mean, and why viruses with these letters cause the most concern.
February 21, 2013 It appears that the current batch of flu vaccine is only about 9 percent effective in protecting people 65 and older against the H3N2 flu strain that's causing the most illness. Even so, health officials still recommend vaccination.
January 18, 2013 According to the latest update from the Centers for Disease Control and Prevention, the number of people age 65 and older who are getting the flu jumped sharply in the last week or so. But even though 48 states are reporting widespread activity, the agency says there are signs the flu may be easing in some parts of the country.
January 17, 2013 Flu viruses hijack the machinery inside animal cells to replicate. The theft is a complicated process that takes time. If the virus leaves the cells too early or too late, the risk of infection falls.
January 11, 2013 The flu season may be easing up in some parts of the country, but it's far too soon to let you guard down. The Centers for Disease Control and Prevention says influenza infections ebb and flow unpredictably.
January 11, 2013 Across the nation, many Americans are suffering from an outbreak that has hit hard and hit early. Hospitals are jammed and many places are running out of vaccine. The flu's already been blamed for the deaths of at least 20 children.
August 3, 2012 The Centers for Disease Control and Prevention has issued new warnings about a flu virus that infected 16 people in three states in the last few weeks. Almost all the infections occurred in kids who had close contact with pigs at agricultural fairs.
February 29, 2012 The studies in question looked at how the bird flu virus could spread through the air. An expert panel that advises the government on biosafety in research had earlier said the findings should not be published, fearing that the data could fall into the wrong hands.
February 23, 2012 It's been an unusually late and mild flu season this year, according to the federal Centers for Disease Control and Prevention. Many people have gotten their flu shots, which seems to be helping. But there's still time for the flu to break out.
February 9, 2012 The scientists, journal editors and others who attend are expected to review the facts and the most pressing issues related to this specific work, rather than have a broader discussion about the possibility of international oversight of potentially worrisome biological research.