This is an interesting documentary on how the village of Eyam, in Derbyshire survived the Black Death. How the CCR5-Delta32 mutation is linked to HIV immunity.
Also those with the Delta mutation aren't get seriously affected by Covid-19 or simply they are not infected. This is not mentioned in the video but scientists are aware and trying to ascertain whether a CCR 5 (Chemokine Receptor-5) blocking antibody could be developed or on how the CCR5 can be targeted to develop a Covid-19 drug.
Also those with the Delta mutation aren't get seriously affected by Covid-19 or simply they are not infected. This is not mentioned in the video but scientists are aware and trying to ascertain whether a CCR 5 (Chemokine Receptor-5) blocking antibody could be developed or on how the CCR5 can be targeted to develop a Covid-19 drug.