3 ms·

The measles vaccine is not perfect either. The only reason we don't have to worry abour measles is because enough people have been vaccinated to achieve herd im

by ufo 5y ago

The measles vaccine is not perfect either. The only reason we don't have to worry abour measles is because enough people have been vaccinated to achieve herd immunity and bring down the transmission to zero. However, if vaccination rates drop even a little bit then outbreaks can pop up again because measles is extremely contagious.

josephcsible 5y ago
> However, if vaccination rates drop even a little bit then outbreaks can pop up again because measles is extremely transmissable. But in cases when that's happened, how many people caught "breakthrough" measles, as opposed to unvaccinated people catching measles?
- gus_massa 5y ago
  Not exactly what you are asking, but close enough: From https://en.wikipedia.org/wiki/Measles_vaccine https://en.wikipedia.org/wiki/Measles_vaccine > This is often done at age 15 to 18 months. After one dose at the age of nine months 85% are immune, while a dose at twelve months results in 95% immunity. This graphic is interesting https://en.wikipedia.org/wiki/Measles_vaccine#/media/File:Measles_Canada_1924-2018.png https://en.wikipedia.org/wiki/Measles_vaccine#/media/File:Me... With one dose the case number is reduced a lot, but there are still some smaller peaks aver few years. After the second dose was made mandatory, the number of cases goes to almost zero. I'm not sure about Canada, but here in Argentina kids get two doses, and every 5-10 years there is a effort to give an additional dose to some groups with more risk (like small children).
willcipriano 5y ago
Like last years flu vaccines, the current covid vaccines are targeting last years version of the virus, since then the virus has evolved to escape the vaccine[0]. 100% uptake of the current vaccine won't eliminate the virus. [0]https://pubmed.ncbi.nlm.nih.gov/34593004/ https://pubmed.ncbi.nlm.nih.gov/34593004/
nradov 5y ago
I encourage everyone eligible to get vaccinated, but since the vaccines don't reliably prevent transmission there will be no significant herd immunity effect. https://www.businessinsider.com/delta-variant-made-herd-immunity-not-possible-astrazeneca-developer-2021-8?r=US&IR=T https://www.businessinsider.com/delta-variant-made-herd-immu...

by ufo 5y ago

josephcsible 5y ago

> However, if vaccination rates drop even a little bit then outbreaks can pop up again because measles is extremely transmissable. But in cases when that's happened, how many people caught "breakthrough" measles, as opposed to unvaccinated people catching measles?

gus_massa 5y ago
Not exactly what you are asking, but close enough: From https://en.wikipedia.org/wiki/Measles_vaccine https://en.wikipedia.org/wiki/Measles_vaccine > This is often done at age 15 to 18 months. After one dose at the age of nine months 85% are immune, while a dose at twelve months results in 95% immunity. This graphic is interesting https://en.wikipedia.org/wiki/Measles_vaccine#/media/File:Measles_Canada_1924-2018.png https://en.wikipedia.org/wiki/Measles_vaccine#/media/File:Me... With one dose the case number is reduced a lot, but there are still some smaller peaks aver few years. After the second dose was made mandatory, the number of cases goes to almost zero. I'm not sure about Canada, but here in Argentina kids get two doses, and every 5-10 years there is a effort to give an additional dose to some groups with more risk (like small children).

willcipriano 5y ago

Like last years flu vaccines, the current covid vaccines are targeting last years version of the virus, since then the virus has evolved to escape the vaccine[0]. 100% uptake of the current vaccine won't eliminate the virus. [0]https://pubmed.ncbi.nlm.nih.gov/34593004/ https://pubmed.ncbi.nlm.nih.gov/34593004/

nradov 5y ago

I encourage everyone eligible to get vaccinated, but since the vaccines don't reliably prevent transmission there will be no significant herd immunity effect. https://www.businessinsider.com/delta-variant-made-herd-immunity-not-possible-astrazeneca-developer-2021-8?r=US&IR=T https://www.businessinsider.com/delta-variant-made-herd-immu...