in fairness, even Fauci says that those who've gone through recovery will in most likelihood have immunity for a few years until the virus mutates enough. This is just the nature of virus according to him & most experts. What worries me is the "reactivation" news coming out of S. Korea.
The troubling news is examples of people who recovered from COVID-19 and then weeks later test positive again.
The problem from a public health strategy perspective is that you cannot pursue a "herd immunity" strategy until it is verified that having COVID-19 provides an individual with personal immunity to disease and immunity from being a carrier that spreads the disease.