This article is only extremely tangentially related to COVID-19, but it's fascinating:
https://www.bbc.com/future/article/20211112-the-people-with-immune-amnesia
The gist of it is that catching measles causes one's memory T-cells to forget what they know about identifying/neutralizing almost all other pathogens previously encountered or vaccinated against. You end up with T-cells that are expert at wiping out any future exposure to measles, but you no longer have immunity to other diseases. This has potential implications for people who believe they're fully vaxxed against COVID-19 (and other diseases) but subsequently catch measles.
This table (from a different source) shows vaccination rates for measles by country. The US is just at 92%. Ii don't know whether that's a result of the anti-vax movement or failure to vaccinate folks who were past childhood when the first measles vaccine was introduced in 1963; the combination MMR vaccine was first authorized for use in the US in 1971. Two European countries have scary-low measles-vaccination rates, Montenegro at 58% and Bosnia-Herzegovina at 68%. A few others are in the 80%-90% range.
https://www.worldatlas.com/articles/countries-with-the-highest-measles-vaccination-rates.html
https://www.bbc.com/future/article/20211112-the-people-with-immune-amnesia
The gist of it is that catching measles causes one's memory T-cells to forget what they know about identifying/neutralizing almost all other pathogens previously encountered or vaccinated against. You end up with T-cells that are expert at wiping out any future exposure to measles, but you no longer have immunity to other diseases. This has potential implications for people who believe they're fully vaxxed against COVID-19 (and other diseases) but subsequently catch measles.
This table (from a different source) shows vaccination rates for measles by country. The US is just at 92%. Ii don't know whether that's a result of the anti-vax movement or failure to vaccinate folks who were past childhood when the first measles vaccine was introduced in 1963; the combination MMR vaccine was first authorized for use in the US in 1971. Two European countries have scary-low measles-vaccination rates, Montenegro at 58% and Bosnia-Herzegovina at 68%. A few others are in the 80%-90% range.
https://www.worldatlas.com/articles/countries-with-the-highest-measles-vaccination-rates.html