Feb 20, 2014 — Middle-aged and younger adults are being hospitalized at much higher rates than usual. Lower vaccination rates appear to be one reason behind the trend.
Feb 16, 2014 — Scientists have apparently been wrong about where new flu viruses come from, and they've underestimated the viruses' connection to horses. The dogma is that new viruses always incubate in wild migratory birds first, then get into domestic poultry, and then jump into mammals — especially pigs and humans.
Feb 13, 2014 — Young people are usually less likely to become seriously ill with flu, but this season looks like an exception to that rule. Blame the H1N1 strain. Even though the flu vaccine is less than perfect, getting a shot each year can make the illness less severe, doctors say.
Sep 26, 2013 — Even though influenza is one of the most common illnesses, researchers say they still have a lot to learn about it. In a recent study, dozens of volunteers agreed to be infected with the swine flu so doctors could see what happened.
Apr 24, 2013 — Concerns about the flu have intensified as the cases and fatalities mount. Transmission of the virus between birds and humans appears to happen fairly easily. It's unclear whether it can spread from one person to another.
Mar 8, 2013 — Why do people in Boston get the flu when it's cold, while people in Senegal get sick when it's hot? Humidity is a big part of the explanation. But how flu spreads in the tropics and more temperate climates appears to be different.
Jan 18, 2013 — The Food and Drug Administration just approved a flu vaccine made by cells taken from the fall armyworm, an agricultural pest. The cells produce copies of a piece of the flu virus's outer coat that primes the immune system. Conventional vaccines use the whole virus and take longer to produce.
Jan 15, 2013 — As students return to class from winter break, campus health official are trying to avert an outbreak. Colleges in Boston are especially worried after the mayor's declaration last week of a public health emergency in the city.
Jan 15, 2013 — It's still too soon to say whether this is a historically bad flu season. But it's already clear that emergency rooms around the country are filled with feverish throngs that are much larger than during the last flu season.
Jan 10, 2013 — Warnings that this year's flu season was likely to be a bad one are already bearing out in Boston. But an infectious disease doctor says the flu season may have already peaked last week.