A new study — co-authored by SpaceX CEO Elon Musk — suggests that those who had mild COVID-19 symptoms had less immunity than those who had more severe illnesses.

What’s going on?

More than 4,300 employees of SpaceX volunteered for a new COVID-19 antibody study, according to The Verge.

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The findings showed those who had milder symptoms of COVID-19 had less immunity to the novel coronavirus compared to those who had more severe symptoms.

  • “People can have antibodies, but it doesn’t mean they are going to be immune,” one of the study’s authors said, according to Business Insider.

The study’s authors said there’s likely a threshold that can create immunity, but the specific threshold number remains unclear.

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  • However, the study didn’t have a diverse participant group with 84% of participants being male with a median age of 32, according to the New York Post.

Bigger picture:

As The Verge points out, Musk previously downplayed the coronavirus threat. He said back in March 2020 that people were more likely to die in a car accident than from COVID-19.

  • He said COVID-19 wouldn’t be “within the top 100 health risks in the United States.”
  • He also said there would be “probably close to zero new cases” in the United States “by (the) end of April.”

Since then, there have been 500,000 deaths in the U.S. from the novel coronavirus.