Article title: coronavirus immunity is "short-lasting"

Article figure: median time to re-infection ~ 2.5 years

(Median = black vertical line below)

Most people would be happy with >2 years to reinfection, especially with reduced clinical severity...…
The above is an example of how scientists and journal editors could better communicate findings and risks

The widespread and baseless fears that there would not be immunity to #covid19 could have been reduced, rather than increased, by more careful reporting of the same data
From the same study:

~50% of people infected with endemic coronaviruses still have higher levels of antibodies after 4 years

No reason to think that #covid19 would be wildly different

(antibodies don't necessarily = clinical protection, but still good data)
So it is absolutely no surprise that for #covid19 we find:

"About 95% of subjects retained immune memory at ~6 months after infection."

This is what we would expect for a novel coronavirus that behaves like other more familiar coronaviruses…
While we are on the coronavirus family, similar results regarding antibody duration for SARS:

Average > 2 years duration of antibody response

Obviously a more severe disease than #covid19, but reassuring to see lasting anti-coronavirus immune responses…

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More from @ID_ethics

26 Jan
Terminology thread:

rate ≠ risk
infection ≠ disease
quarantine ≠ isolation
social distancing ≠ physical distancing
prolonged PCR positivity ≠ shedding
virulence ≠ transmissibility

References to follow
1/ rate ≠ risk

A risk is a probability of a harm (of a given magnitude)

A rate is something that varies over time…
2.1/ infection ≠ disease

Many infections are asymptomatic or even beneficial!

An infectious disease only occurs when the host-pathogen interaction results in harm (i.e., a harmful disturbance of normal host function)…
Read 10 tweets

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