That is not what the FDA source you linked to says. You either had a massive error in comprehension or are deliberately misleading others. What the FDA said, s

That is not what the FDA source you linked to says. You either had a massive error in comprehension or are deliberately misleading others. What the FDA said, simplified, is there is no evidence either way whether a breakthrough COVID case in a vaccinated person poses a greater risk of infection to other vaccinated people, BUT past vaccinations have shown that those other vaccinated people are still protected and therefore that should be the assumption here until refuted. Original: Q: If a person has received the Pfizer-BioNTech COVID-19 Vaccine, will the vaccine protect against transmission of SARS-CoV-2 from individuals who are infected despite vaccination? A: Most vaccines that protect from viral illnesses also reduce transmission of the virus that causes the disease by those who are vaccinated. While it is hoped this will be the case, the scientific community does not yet know if the Pfizer-BioNTech COVID-19 Vaccine will reduce such transmission.