Pfizer says it’s “generating data” by taking blood from people who have already been inoculated, throwing it in a test tube, and testing to see if the blood “may be able to neutralize the new strain from the UK,” according to the network. Moderna, on the other hand, said only that it will be “performing additional tests in the coming weeks to confirm this.”

Both companies insist their vaccines have proven effective against other variants of the virus. However, some researchers who have been studying the mutant strain’s genome have told CNN they have concerns that his particular mutation might reduce the effectiveness of the vaccines. That’s not to see it will render the vaccine completely useless, but it is some food for thought.



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