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The coronavirus mutates more slowly than the flu — which means a vaccine will likely be effective long-term
"The new coronavirus, however, seems to mutate slowly, experts say. This means its vaccine would most likely be effective long-term, much like a measles vaccine."
From ...
https://medicalxpress.com/news/2020-06-sars-cov-mutating-slowly-good.html
"Viruses evolve over time, undergoing genetic changes, or mutations, in their quest to survive. Some viruses produce many variations, others only a few. Fortunately, SARS-CoV-2, the novel coronavirus that causes COVID-19, is among the latter. This is good news for scientists trying to create an effective vaccine against it.
"The virus has had very few
genetic changes since it emerged in late 2019," says Peter Thielen, a molecular biologist at the Johns Hopkins Applied Physics Laboratory and JHU Doctor of Engineering candidate, who, with colleagues from other areas of the Hopkins research community, has been sequencing the
viral genome to better understand its makeup. "Designing vaccines and therapeutics for a single strain is much more straightforward than a virus that is changing quickly."