Why is Covid-19 spiking in Mumbai again? Why are you getting infected within 2 months?

Is it normal for a Covid-19 recovered patient to contract infection within a two-month window? Does that mean that even infection-acquired immunity is not protecting us? But if experts are to be believed, there is no reason to worry. “Currently, there are many sub-variants of the virus in circulation simultaneously. And the immunity acquired from contracting infection because of a particular sub-variant doesn’t mean that you are fully…