From the article:
“Herd immunity is when people who are prone to the milder forms of this infection get it, get over it, get antibodies and are immune…if I have antibodies, I can’t get it and I can’t give it to you, so it doesn’t matter if you’re vulnerable. If we shake hands you won’t get it from me.”
When enough people have antibodies, the virus can’t get through the population. “It finds it harder to get through to a host where it can survive and it dies out, that’s herd immunity,” Dr. Katz told Levin.”
Who was it claimed that people couldn’t get immunity from the c-virus?
Who? WHO says no evidence of Covid-19 immunity from antibodies