News We’ve achieved herd immunity for the measles. Will we ever get there on COVID-19? March 30, 2021 Dr. Marc Siegel Comments Off on We’ve achieved herd immunity for the measles. Will we ever get there on COVID-19? I hope the fear of COVID-19 will be fading by our July 4 barbecues. But for now it is an important reminder of why we must get vaccinated.