| Popis: |
SARS-CoV-2 genetic variants from alpha (first detected in the UK) to delta (discovered in India this spring) to lambda (currently Argentina, Brazil, Chile, Colombia, Ecuador, and Peru) have been emerging and circulating the world. Also, these variants have raised concerns about the continued effectiveness of COVID-19 vaccines. In this review, influential variants cause countries to review their vaccine strategies, create new vaccine programs, and accelerate existing vaccine studies. The effectiveness of currently available COVID-19 vaccines on variants is discussed. It is also intended to shed light on what should be known about the necessity of third doses. |
