A woman receives her vaccine against COVID-19 near Johannesburg (Image: AP Photo/Denis Farrell/File)

A new COVID-19 variant has emerged in Botswana, spreading to South Africa and Hong Kong. There are nearly 100 confirmed cases across the globe of the new variant, called B.1.1.529. It’s so new, it’s yet to be assigned a name by the World Health Organization (though if it is given one, it is likely to be called Nu, the next available letter in the Greek naming system).  

Variants pop up all the time — like all viruses, SARS-CoV-2, the virus that causes the COVID-19 illness, constantly mutates.