It’s only when you have low enough vaccine coverage that the strains can circulate. Rockland County, NY where it first started in the US had only 60% vaccine coverage.
Children missing vaccine appointments due Covid19 and pockets of vaccine hesitancy have created this situation. For example, Hasidic Jews have anti-vaxxer tendencies.
Children missing vaccine appointments due Covid19 and pockets of vaccine hesitancy have created this situation. For example, Hasidic Jews have anti-vaxxer tendencies.