Thanks for this link. From the article she states: “Mutations that alter any of the following can lead to a new strain: pathogenicity virulence immunogenicity

Thanks for this link. From the article she states: “Mutations that alter any of the following can lead to a new strain: pathogenicity virulence immunogenicity.” And “ Another way that the term strain is used is when a particular variant of the virus (the virus with a specific set of mutations) ” This sounds like the mutation referenced in the paper could be considered a “new strain” given the above? “ Until there is clear evidence supporting functional or immunogenic differences among the variants, it is appropriate to consider all of these lineages of the same virus.”