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  2. Apr 4, 2022 · When considering why someone might not have tested positive for COVID-19, it's also important to look at how likely it is they were exposed, and the nature of that exposure.

  3. Mar 22, 2022 · Researchers are trying to understand why some people never get COVID-19 despite exposure. One study is exploring whether genetic factors play a role in making someone immune to the virus. Another study investigated preexisting immunity, potentially brought on by infections with other coronaviruses. Scientists are looking into what makes someone ...

  4. Jan 25, 2022 · Why you may not get COVID-19 even when those around you have it. How past exposure to other coronaviruses can stop people from catching COVID-19 even if they live with someone who has tested...

  5. 3 days ago · Not all exposed participants went on to develop a COVID-19 infection, allowing the team to uncover unique immune responses associated with resisting sustained viral infection and disease. The ...

  6. Apr 21, 2022 · Experts stressed that research to determine why some people get COVID-19 while others don’t is still very much underway, and no one should rely on any of the hypotheses for protection.

  7. 3 days ago · Unique cell responses mean some people may be immune to catching the coronavirus, even if they are unvaccinated. By Sonali Roy. 19 June 2024. Volunteers have been exposed to the coronavirus that ...

  8. Jan 17, 2024 · A new study finds that most COVID-19 transmissions occur after exposures lasting an hour or longer, and short encounters are lower risk.

  9. Researchers have shed new light on why some people do not get Covid-19.. In a world-first, 36 healthy people who had never had coronavirus were deliberately given the virus that causes the disease.

  10. Sep 12, 2022 · The most promising candidates are those who have defied all logic in not catching Covid despite being at high risk: health care workers constantly exposed to Covid-positive patients, or...

  11. Jul 19, 2023 · A new study says a gene mutation may explain why some people don't get COVID-19 symptoms when they're infected by SARS-CoV-2.

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