So vaccines mitigate the effects of the virus
We have no idea whether that percentage holds, but even if it does, that's a 90% drop in risk of infection. That's pretty good. At the start of Operation Warp Speed, we were told that anything over 50% was pretty good for the first available vaccines. 90% would have been beyond anyone's wildest dreams.
Boosters being tested right now by Moderna and Pfizer account for the specific mutations in the Indian variant. That efficacy will jump significantly for anyone who gets the booster when it's available in the fall. Seems like we're staying ahead of this thing really well.