https://techcrunch.com/2021/01/25/moderna-says-its-making-variant-specific-covid-19-vaccines-but-its-existing-vaccine-should-still-work/

Moderna has detailed some of the steps it’s taking to ensure that its vaccine remains effective in the face of emerging strains of the SARS-CoV-2 virus that leads to COVID-19. These include testing how adding a second booster, for a total of three shots, works with its existing COVID-19 vaccine, and also developing a strain-specific variant designed to target spike proteins on the new variants of the virus that were first identified in the UK and in South Africa.

The company is pursuing these measures “out of an abundance of caution,” the biotech firm said in a press release, since early studies show that the existing vaccine continues to prove effective against these new strains, albeit with some loss of efficacy specifically with the B.1.351 variant which was first identified in patients in South Africa. Even so, it’s heartening to see the company moving quickly to address the virus’ mutation, since it’s likely that similar adaptations will be required longer term to keep COVID-19 in control even once the current pandemic is ended.