As US leaders work to control the spread of coronavirus, researchers across the country — and globe — are working to answer the mysteries that remain around infections.

One of those mysteries: why the experience can be so vastly different from person to person. One expert says the answer may mean taking a closer look at previous vaccines individuals have had.

“When we looked in the setting of Covid disease, we found that people who had prior vaccinations with a variety of vaccines — for pneumococcus, influenza, hepatitis and others — appeared to have a lower risk of getting Covid disease,” Dr. Andrew Badley, an infectious disease specialist at Mayo Clinic told CNN’s Anderson Cooper Monday night.

It’s what immunologists call immune training: how your immune system creates an effective response to fight off infections, Badley says.

“A good analogy is to think of your immune system as being a muscle,” he said. “The more you exercise that muscle, the stronger it will be when you need it.”

There’s been no definitive evidence of any other vaccines boosting immunity against Covid-19. But some researchers have suggested it’s possible.

Source : CNN

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