Coronavirus vaccine: why immunizing older people is more difficult

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  • William Park
  • Da BBC Future

In a hypothetical alternative universe where we already have a vaccine against covid-19, world leaders will have options on how to distribute it to the population.

The most vulnerable people, along with nurses, doctors and other health professionals who care for them, are likely to be protected first.

It would be nice if it were that simple. The most vulnerable age group, the elderly, is particularly difficult to vaccinate.

“We have very few vaccines designed for older populations,” says Shayan Sharif, professor of vaccinology at the University of Guelph, Canada. “More than ever, in the past century, most vaccines targeted childhood illnesses.”

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