I dont think that we will face a bigger third wave. If you see who is getting infected this time in mumbai, according to a times of india article, only 10 percent of the victims are from slums, and most of the victims are from housing societies and apartments, who were spared in the first wave due to struct modi initiated lockdown.. So, although not as effective as vaccines, prior infection is providing some level of protection.. Also around 10 percent indians have already received atleast one dose of vaccine. So, by the time the third wave hits, we should be in a better position, both w.r.t vaccination, and antibodies and T-cell memory due to very high infection levels in the second wave, as our public does not mask up.