John Moore/Getty Images 23 Jul 2021 An Army commander recently decided to mandate wearing masks indoors for service members and civilians under his command, citing the delta variant of the coronavirus and breakthrough cases of infection among those vaccinated. Maj. Gen. Dennis LeMaster, commanding general of the U.S Army Medical Center of Excellence (MEDCoE) at Fort Sam Houston in Texas announced on social media accounts that he has mandated mask-wearing indoors beginning Sunday. He tweeted Monday: “It’s all about readiness. While local #COVID19 [Chinese coronavirus] cases increase I have, once again, mandated mask wear indoors. Wear your masks and #GetTheShot. It’s all about protecting each other and #Soldier readiness!”