We have exactly what we need to stimulate a coming flu epidemic this year – flu activity has begun to increase in some parts of the world, just as more countries have opened their borders, which will increase international travel.
It is large groups of unvaccinated people in which SARS-CoV-2 continues to spread, allowing it to mutate, that is responsible for the variants we are seeing.
The Delta variant is causing SARS-CoV-2 cases to surge, especially in folks who are unvaccinated.
Viruses with variants aren’t anything new. The COVID-19 variants are a concern because some of them are more contagious, more deadly, and may lead to vaccine failures.