Delta virus - Unraveling the Mysterious Mutations That Make Delta the Most Transmissible Covid Virus Yet

All viruses mutate and they mutate often, says Andrew Pekosz, professor of molecular microbiology and immunology at the Johns Hopkins Bloomberg School of Public Health.

So the next couple of months are going to be really interesting to see.

People may think they have caught some kind of seasonal cold and spread the virus to other people as they move on with their lives.

Chills, loss of appetite, headache and muscle aches were together most strongly linked with being infected, alongside classic symptoms.