Scientists Say Delta Mutation No Reason to Panic, but COVID Vaccination Remains Crucial
- The subvariant — which is thought to have emerged in the U.K. over the summer — has two additional mutations affecting its spike protein, part of the virus’s structure used to infiltrate cells.
- Questions are still hanging over exactly how, or if, those mutations will affect how quickly it spreads.
- In the last 28 days, AY.4.2 has accounted for around 10% of new Covid-19 cases, according to data from public health consortium Cog-UK.