Booster Needed for Delta and Lambda Variants

Scientists may have underestimated the coronavirus. In the beginning, they said mutated versions shouldn’t be much of a problem—until Alpha spiked last fall. Then, Beta made young people sicker. And Gamma reinfected people. Some epidemiologists were cautiously optimistic that the rapid vaccine rollout would tame the variants… until the Delta variant appeared. Delta was first …

Booster Needed for Delta and Lambda Variants Read More »