Billions poured into Covid vaccine facilitated multiple tests at the same time

Billions poured into Covid vaccine facilitated multiple tests at the same time

The slowest part of vaccine development isn’t finding candidate treatments, but testing them. This often takes years, with companies running efficacy and safety tests on animals and then in humans. Human testing requires three phases that involve increasing numbers of people and proportionately escalating costs. The Covid-19 vaccines went through...

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