US researchers are testing a shot made by Massachusetts biotech Moderna that's tailored to neutralize a concerning variant of the novel coronavirus. The research is the latest escalation in society's battle against variants of the virus. Experts worry that specific mutations in the virus' spike protein, the target of coronavirus vaccine,The variant first found in South Africa, called the B.1.351 variant, has been especially concerning.
. Moderna has become the first to start human testing of a variant-focused shot, with this study being run by the US National Institutes of Health.
Does this mean that people who are already vaccinated will get a third shot or...they just lost their chance to get a 'better' shot the first two times?
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