Despite what internet consiracy theorists (read most Republicans/Conservatives) are trying to purport, the efficacy of wearing well fitted n95 masks is naerly 100%. That’s right, wearing a mask work really really well as the primary measure to mitigate infections. Why aren’t more wearing it? A combination of cultural issues where wearing a mask is considered countercultural, and simply the unwillingness to stay healthy. Most folks would prefer to get sick constantly in the never-ending carousel of inheriting more and more disabling sicknesses from repeated viral infections.
Wear your mask!
Study link: https://sph.umd.edu/news/study-shows-n95-masks-near-perfect-blocking-escape-airborne-covid-19