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Jul 16, 2020

How long does immunity last after a COVID infection? News reports of two recent studies suggest that it wanes quickly and that some patients may never have immunity at all. In this episode, we take a look at those studies and explain why they don't exactly say what is being said about them.
Take home points
  • Not everyone keeps detectable IgG after asymptomatic or symptomatic infection
  • If you have asymptomatic COVID-19 infection, you are less likely to have detectable IgG at 8 weeks compared to someone who had symptoms
What we still don't know
  • Does this drop or absence of IgG correlate to decreased immunity? The reflex answer would seem to be 'yes' but we still don't understand the COVID-19 correlates of protection (blood tests that can show whether or not someone has immunity).
  • The likelihood of those who have had COVID-19 getting reinfected. The studies discussed in this podcast evaluated parts of the immune system that are involved in immunity, but we haven’t answered the real question: what is the likelihood of having a repeat illness (or repeat asymptomatic infection). 
Mentioned in this show
The Stimulus COVID Podcast Page: Click Here
For References and Links to the Studies: Click Here
To Learn More About Stimulus: