Different Approaches to a Coronavirus Vaccine

Scientists are developing more than 100 coronavirus vaccines using a range of techniques, some of which are well-established and some of which have never been approved for medical use before.

Most of these vaccines target the so-called spike proteins that cover the virus and help it invade human cells. The immune system can develop antibodies that latch onto spike proteins and stop the virus.

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By Jonathan Corum, Knvul Sheikh and Carl Zimmer