CDC investigates new Delta-related coronavirus variant, AY.4.2
A subtype of the Delta variant, called AY.4.2, is causing an increasing number of infection cases in the United Kingdom. AY.4.2 is still "very rare" in the US, according to the Cen…
A subtype of the Delta variant, called AY.4.2, is causing an increasing number of infection cases in the United Kingdom. AY.4.2 is still "very rare" in the US, according to the Cen…