3 ms·
IIRC it took about 20 years to be apparent with Marek's disease. The polio vaccines aren't "leaky", but we are seeing increasing problems with oral-vaccine-der
by Izkata 4y ago
IIRC it took about 20 years to be apparent with Marek's disease.
The polio vaccines aren't "leaky", but we are seeing increasing problems with oral-vaccine-derived polio now: https://www.who.int/emergencies/disease-outbreak-news/item/2022-DON408 https://www.who.int/emergencies/disease-outbreak-news/item/2... - there are more cases of this than of "wild" polio nowadays.
- JumpCrisscross 4y ago> polio vaccines aren't "leaky" Non-sterilising polio vaccines prevent illness but not infection and re-transmission. OPV is the one that sterilises.