WHO warn on coronavirus
herd immunity maybe useful
50-60 % population need herd immunity
herd immunity is necessary for fighting covid- 19
vaccines is most important for coronavirus protection but being late , many country developed ( covid-19) coronavirus- vaccine but under trile maybe possible vaccination after some month in public ends of 2020
WHO warn on coronavirus
herd immunity maybe useful
50-60 % population need herd immunity
herd immunity is necessary for fighting covid- 19
vaccines is most important for coronavirus protection but being late , many country developed ( covid-19) coronavirus- vaccine but under trile maybe possible vaccination after some month in public ends of 2020
