COVID-19 Vaccines: A Dose Of Caution From Merck
The global COVID-19 pandemic is prompting an unprecedented effort to develop a vaccine in record-breaking time. But there may be pitfalls in letting optimism run too far ahead of the realities of vaccine development.
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Pfizer said it is dosing patients now with an mRNA-based vaccine and expects human data in May/June, with a goal to have a vaccine available for emergency use possibly by October.
The Trump administration says a COVID-19 vaccine could be available in as little as 12 months, but most experts think that is overpromising unless safety or efficacy standards are sacrificed. Many are urging pivotal studies that look at clinical outcomes, not surrogates, for US FDA approval.