Covid's early Christmas present
The virus has delivered a massive Holiday surge and now a new, possibly more dangerous, strain—prompting a revival of restrictions and travel crackdowns.
The World Health Organization has called an urgent meeting Friday to evaluate a newly identified strain of Covid-19 causing a spike of infections in South Africa. The new variant, so far known only as B.1.1.529, has significant mutations that health experts say may make it the most worrying variant yet, more transmissible and able to overcome immunity a…