But vaccines are VERY effective in reducing likelihood that one will get the virus.
'A small percentage of people fully vaccinated against COVID-19 will still develop COVID-19 illness
COVID-19 vaccines are effective. However, a small percentage of people who are fully vaccinated will still get COVID-19 if they are exposed to the virus that causes it.'
https://www.cdc.gov/coronavirus/2019-ncov/vaccines/effectiveness/why-measure-effectiveness/breakthrough-cases.html