The fact of the matter is the cold hard truth is that these covid vaccines are essentially worthless, as they are imperfect "leaky" vaccines which DO NOT stop transmission of this virus dead in its tracks like the vaccines we have for say polio or smallpox.
Except that the commonly used polio vaccine in the US, the one we most likely all received in this country, also does not stop transmission...
https://www.cdc.gov/cpr/polioviruscontainment/diseaseandvirus.htmInactivated poliovirus vaccine
Inactivated poliovirus vaccine (IPV) protects people against all three types of poliovirus. IPV does not contain live virus, so people who receive this vaccine do not shed the virus and cannot infect others, and the vaccine cannot cause disease. IPV does not stop transmission of the virus. OPV is used wherever a polio outbreak needs to be contained, even in countries which rely exclusively on IPV for their routine immunization program. Once polio has been eradicated, use of all OPV will need to be stopped to prevent re-establishment of transmission due to VDPVs.
The mRNA vaccines are used for COVID because trying to use a live virus vaccine would be incredibly difficult to make safe and get through testing. I.e. you need to make sure that by giving someone a live or attenuated virus, that you don't cause too many of them to have symptomatic COVID and be hospitalized or die. And the live virus vaccines can actually cause you to shed the virus itself, and CAUSE you to spread the virus.
The mRNA vaccines don't do that. It's impossible to catch COVID from the vaccine, because it's merely causing your body to produce the spike protein for your immune system to recognize. It's impossible to spread COVID
from the vaccine, because the vaccine doesn't contain COVID.
But it is possible to still catch COVID. Your body has learned immunity to protect you, as the vaccine recipient, from harm, just like the inactivated polio vaccine. So your threat of severe illness or death is much lower. But as it's still possible to be infected, it is still possible to transmit the virus, just like polio.