What will the second generation of COVID-19 vaccines look like?

electron micrograph showing a pink host cell that contains endosomes with green sars-cov-2 particles inside
SARS-CoV-2 particles (green) in endosomes of an infected nasal epithelial cell. Credit: NIH / NAID / IMAGE.FR / BSIP / Universal Images Group via Getty Images.

COVID-19 vaccines were developed in record time, but researchers continue to work, aiming for more potent immunity, reduced transmissibility, cheaper manufacturing, easier transport, and mutation-proofing.

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