To be fair, vaccines prevented the transmission and infection of Covid very well until Omicron showed up. Under Delta (and earlier) the vaccinated breakthrough rate in the U.S. was a mere 0.56% -- a rate which is far below the vaccinated breakthrough rate of measles at over 3%.
When Omicron showed up -- which is more infectious and very vaccine evasive (in regards to infection) -- the vaccinated breakthrough rate went way up. With BA.5 the effectiveness of vaccines to prevent infection is down at 12% -- which is still better than unvaccinated "natural immunity" with a 0% capability of preventing infections with Omicron. When Omicron specific boosters are available in the fall this situation will improve in regards to vaccinations preventing infection.
Covid vaccine 66 per cent less effective at preventing infection than it was just two months ago, expert says
As Covid cases hit new record in the UK the vaccine effectiveness has tumbled but they are still good at preventing infections from becoming dangerous
https://inews.co.uk/news/science/covid-vaccine-less-effective-preventing-infection-1739071
This is true and studies reflected it. Media did a piss poor job (comparatively) of covering mutations and waning efficiency
haha