A US military report finds mysterious objects seen by Navy pilots remain unexplained, officials say.
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'Nepal variant': What's the mutation stopping green list trips to Portugal?
Fri Jun 4 , 2021
In February, a small number of cases of the UK or Alpha variant were found with a mutation, called E484K, that is already seen in the South Africa variant. It was feared this change could reduce vaccine effectiveness, but the mutation never took off. Source link
