Coronavirus: Herd immunity is back in the news! and today the White House Embraces Covid-19 ‘Herd Immunity’ Declaration.What is herd immunity and how can we achieve it with COVID-19? Speaking at a news conference on Monday, Dr Tedros argued that the long-term impacts of coronavirus - as well as the strength and duration of any immune response - remained unknown.He added that “Herd immunity is a concept used for vaccination, in which a population can be protected from a certain virus if a threshold of vaccination is reached”“Never in the history of public health has herd immunity been used as a strategy for responding to an outbreak”, the WHO chief said, calling it “scientifically and ethically problematic”.