One fairly small mutation back in the spring from what I've read.Yep, the common cold is a misnomer. There are about 200 or more variants I believe. What most people get is some flavour of the rhinovirus, which is by far the most common. The flu has variants too, so the flu jab is just a prediction of the strain of flu that is most prevalent that year.
They'll have to develop vaccines for all variants of covid if it mutates. Has there been any reporting on different virus strains?
The immunisation method is designed to attack in a way that it isn't affected though, apparently.