Vaccines

[Tero]

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2245896/

Older stuff.

Current stuff vs long term vaccines.
https://www.wsj.com/articles/some-vacci ... QHn0I58ckk

[Tero]

From the WSJ

With these diseases, the magnitudes of response to the vaccines combined with the antibodies’ rates of decay produce durable immune responses: Measles antibodies decay slowly. Tetanus antibodies decay more quickly, but the vaccine causes the body to produce far more than it needs, offsetting the decline.

“We’re fortunate with tetanus, diphtheria, measles and vaccinia,” Dr. Slifka said. “We have identified what the threshold of protection is. You track antibody decline over time, and if you know the threshold of protection, you can calculate durability of protection. With Covid, we don’t know.”

Measles, mumps, rubella and chickenpox hardly mutate at all, but at least eight variants of SARS-CoV-2, the virus that causes Covid-19, have been found, according to the British Medical Journal.

“It does make it more complicated for the vaccine to work,” Dr. Slifka said. “You’re chasing multiple targets over time. Flu also mutates. With flu, we’ve adjusted by making a new flu vaccine each year that as closely as possible matches the new strain of flu.”