variant strains

Variant strains are versions of a virus that have slight changes in their genetic makeup. These changes can occur naturally as the virus replicates and spreads. Some variants may differ in how easily they spread, the severity of illness they cause, or how well they respond to vaccines or treatments. Not all variants are more dangerous; many do not significantly impact health. Monitoring and studying these variants helps scientists understand the virus better and adjust public health measures to reduce transmission and impact.