Though it is summertime in the Northern Hemisphere, the H1N1 flu virus continues to spread, causing some to raise alarm.
In Britain, the number of cases is now doubling every week, and a fierce debate has erupted about how to contain the disease. In the past, flu viruses have needed more than six months to spread as widely as H1N1 has spread in less than six weeks.
Andrew Pekosz, a professor of microbiology and immunology at Johns Hopkins University, joins Martin Savidge to discuss the rapid spread of H1N1 and efforts to develop a vaccine.
