Reports that the Johnson & Johnson Covid-19 vaccine may, in extremely rare cases, cause blood clots has dealt a fresh blow to the world's vaccination drive https://t.co/6Tosqgk1Be
Mask mandates can work, according to research released by the CDC.
One new study showed that, in places where state and local governments required mask use, fewer people ended up in the hospital with coronavirus. https://t.co/qIsyyZvWw6