These children were all too young to be vaccinated. So it wasn't a side effect of vaccination.
Furthermore, in the US this is occurring in places with VERY LOW vaccination rates.
Additionally, this Hepatitis is occurring in places using different vaccines, so it's unlikely related to vaccines at all.
"Isolation of the youngest children during the pandemic lockdown may have left them immunologically vulnerable because they haven’t been exposed to the multiplicity of viruses, including adenoviruses, that typically attend toddlerhood."
This hypothesis doesn't pass the sniff test because:
- this Hepatitis is occurring in places that never locked down
- many of these children are too young to have been going to school so weren't impacted directly by school closures even in places where school closures occurred
- some of these children with "mysterious" Hepatitis are babies... they aren't old enough for this hypothesis to make any sense
- there's zero evidence to support this hypothesis (lack of exposure in to various pathogens has never increased rates of Hepatitis in children anywhere)
Do the vaccines prevent transmission, yes or no?
The vaccines likely reduce transmission somewhat. The vaccines are most protective against hospitalization and death. That is, these vaccines mostly work after infection. They likely reduce the amount of time that someone is ill, which reduces transmission. They likely prevent most infections from becoming more than an upper respiratory illness, protecting the rest of the body. But a vaccinated person can get infected and can spread the virus.
Herd immunity is not possible through vaccination. It's also not possible though infection. The protection wanes from both. It just doesn't last long enough to provide a herd immunity type of protection. We need better vaccines and/or layered protections to achieve herd immunity or to force the virus into an endemic state.
Get vaccinated to protect yourself. Keep up with boosters. But also wear an n95 whenever you might have exposure to the virus. And use HEPA in your workplaces and homes to reduce the amount of virus in the air.