New Covid variant found in South Africa: What is known about B.1.1.529

A new variant of the coronavirus that causes Covid-19 -- called B.1.1.529 -- has been identified in South Africa, with officials there saying it’s of concern. Fears a new strain could fuel outbreaks in many countries, straining health systems, potentially evading vaccines and complicating efforts to reopen economies and borders, sent a wave of risk aversion across global markets Friday.
 

Here’s what we know so far:

1. What’s different about this variant? 
 

Scientists say B.1.1.529 carries a high number of mutations in its spike protein, which plays a key role in the virus’ entry into cells in the body. It’s also