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We ask our science correspondent Derrick Williams whether it’s ethical to insist that the vaccine is mandatory for travel?
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We ask our science correspondent Derrick Williams whether it’s ethical to insist that the vaccine is mandatory for travel?
Ask Derrick We ask our science correspondent Derrick Williams: Is it possible that the same variants arose independently, without travel, in different places? Watch video 02:11
Ask Derrick We ask our science correspondent Derrick Williams whether new variants of the coronavirus mean that we will need to develop new vaccines. Watch video 02:27
We ask our science correspondent Derrick Williams if there is a link between mass vaccination and mutation of the coronavirus.