Celtics big man Al Horford tested positive for COVID-19 on Tuesday days after Jaylen Brown was also tested positive.
The league has now reached a 95 percent vaccination rate according to multiple reports, which includes players who have received the first dose.
Phoenix star Devin Booker confirmed on his Twitch channel that he has tested positive for COVID-19 and is set to miss training camp.
The focus has shifted from social distancing and mask wearing, to getting players to get their vaccination done.
The Brooklyn Nets do not anticipate local COVID-19 vaccination requirements "being any sort of hindrance".