It’s OK to be cautiously optimistic, but there’s much still to learn and the data must be peer-reviewed before success is guaranteed.
Pharmaceutical companies Pfizer and BioNTech have announced their COVID-19 vaccine is effective in preventing the virus in 90% of participants.
This number is huge — flu vaccines are only 40% to 60% effective — and the news sent stocks soaring.
But experts have warned the data has not yet been peer-reviewed, stressing cautious optimism is needed and maintaining social measures are important to prevent the virus from spreading.
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