By Beatrix Lockwood

NEW YORK (Reuters) – An unprecedented COVID-19 vaccine campaign is underway with tens of millions now inoculated in the U.S. and around the world. Dozens of vaccine candidates are still in the pipeline, bringing hope for an end to a global pandemic.

As part of our #AskReuters Twitter chat series, Reuters invited a group of healthcare experts to discuss what you should know before getting your shot.

Below are edited highlights.

How do the various vaccines reduce the risk of COVID-19 and its complications? How long will they provide immunity?

“COVID-19 vaccines reduce complications by inducing the immune system to generate antibodies and T-cells that stop the virus from causing damage. The duration of immunity isn’t known, but I suspect longer than

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