UC Davis Medical Center says it has reached herd immunity from COVID-19 among staff through vaccinations. “CBS This Morning” lead national correspondent David Begnaud spoke with one nurse initially hesitant to get vaccinated. Now, she explains why she thinks everyone…
![Doctor: COVID-19 vaccines 'do lead to a really strong immune response' Doctor: COVID-19 vaccines 'do lead to a really strong immune response'](https://www.vitaminrush.com/wp-content/uploads/2021/04/1618699693_maxresdefault-1170x508.jpg)