There may be a world in which millions of Americans take the COVID-19 vaccine to help stop the spread of the novel coronavirus. So what will it feel like to take it? Some details and experiences recently leaked online.

What’s going on:

Five participants in two of the coronavirus vaccine trials recently shared their experiences after taking the shots with CNBC.

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The participants felt:

  • High fever
  • Body aches
  • Bad headaches
  • Exhaustion

The participants — three from Moderna’s trial and two from Pfizer’s late-stage trial — said the symptoms were worth it, though, if it means they’re protecting themselves from the coronavirus.

The symptoms ended after about one day if not sooner, the participants told CNBC.

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Some extra context:

Earlier this week, reports suggested that Moderna’s coronavirus vaccine developed a strong immune response in older and younger adults — a positive sign since vaccines often don’t work well with older adults and the elderly, as I wrote about for Deseret.com.

Moderna, Pfizer, AstraZeneca and Johnson & Johnson remain the four developers with late-stage human trials in play.

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