Could Older Population Have Enough Exposure To Past H1N1 Flu Strains To Avoid Infection?
Thursday, June 25, 2009 - 14:35
in Health & Medicine
The outbreak of H1N1 in 1977 may have an impact on this pandemic. In the late 1970s, an influenza H1N1 appeared in humans. It had a pandemic-like spread that began in younger aged individuals.