<img width=“750” height=“392” src=“https://flowingdata.com/wp-content/uploads/2021/08/How-vaccines-help-e1628879290765-750x392.png" class=“attachment-medium size-medium wp-post-image” alt=“” loading=“lazy” srcset=“https://flowingdata.com/wp-content/uploads/2021/08/How-vaccines-help-e1628879290765-750x392.png 750w, https://flowingdata.com/wp-content/uploads/2021/08/How-vaccines-help-e1628879290765-1090x569.png 1090w, https://flowingdata.com/wp-content/uploads/2021/08/How-vaccines-help-e162