I'll save you the read: "we don't know and we need more data".<p>My anecdotal data: I have a triple-vaccinated friend who tested positive for COVID-19 on Friday. They explicitly said they don't plan on getting additional boosters if they're not of greater efficacy.<p>It's clear that, in widespread usage, the protection rates that Pfizer and Moderna had initially claimed are wildly exaggerated. Even if the vaccine had the claimed 90% effectiveness, we're still less than 70% vaccinated (here in the USA, anyway[1]) and still battling surging numbers and breakout infections.<p>Get a booster if it makes you feel better, but know that it's still entirely possible for you to be infected and to spread the virus to others.[2]<p>[1]: <a href="https://usafacts.org/visualizations/covid-vaccine-tracker-states/" rel="nofollow">https://usafacts.org/visualizations/covid-vaccine-tracker-st...</a>
[2]: <a href="https://www.npr.org/sections/coronavirus-live-updates/2021/07/30/1022867219/cdc-study-provincetown-delta-vaccinated-breakthrough-mask-guidance" rel="nofollow">https://www.npr.org/sections/coronavirus-live-updates/2021/0...</a>