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The World Health Organization and the US Food & Drug Administration have decided on the composition of the influenza virus vaccine that will be used during the 2010-2011 season in the northern hemisphere. The trivalent preparation will contain the following influenza virus strains: A/California/7/2009 (H1N1); A/Perth/16/2009 (H3N2); and B/Brisbane/60/2008. The same trivalent vaccine ...

Today my virology class is taking a midterm examination. To prepare for this in-class test, I provided the students with a study guide highlighting what I believe to be the main concepts that they should learn from each lecture.  Once all the students have taken the exam, I'll post it ...

Hosts: Vincent Racaniello, Dickson Despommier, Alan Dove, and Rich Condit This week the TWiV team explains CRISPR/Cas, the immune system of bacteria and archaea, how novel viruses are discovered by deep sequencing of small RNAs, and the relationship between dry weather and outbreaks of West Nile virus infection. This episode ...

No matter what advanced method is used to develop and produce vaccines, their efficacy is limited by old technology - the refrigerator. All viral vaccines must either be stored frozen, or kept at low temperatures. If they are not properly stored, they lose potency and do not confer protection against ...