KEY POINTS
- U.S. officials and scientists say they are hopeful a vaccine to prevent Covid-19 will be ready in the first half of 2021.
- A lot has changed in the last 50 years that gives scientists reasonable hope a vaccine could be available by early next year.
- However, scientists still don’t fully understand key aspects of the virus, including how immune systems respond once a person is exposed.
A health worker handles a blood sample on the first day of a free Covid-19 antibody testing event in Florida.
Paul Hennessey | Barcroft Media | Getty Images
U.S. officials and scientists are hopeful a vaccine to prevent Covid-19 will be ready in the first half of 2021 — 12 to 18 months since Chinese scientists first identified the coronavirus and mapped its genetic sequence.
It’s a record-breaking time frame for a process that normally takes about a decade…
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Exposing the Big Game 