A flu shot contains several strains but the success of vaccination depends on the strain of seasonal flu circulating and other factors. Photo: Getty Images / AFP

Early childhood flu exposure may determine immunity in later life, but not all strains are equal: scientists

  • People infected with H1N1 can fight off the H3N2 strain but the reverse is not necessarily true, finds paper
  • Influenza immunity findings add weight to the argument that children should be vaccinated but the success of flu shots depends on several factors
Topic |   Wellness
A flu shot contains several strains but the success of vaccination depends on the strain of seasonal flu circulating and other factors. Photo: Getty Images / AFP
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