The United Kingdom has become the first approve a new-and-improved version of Moderna's COVID vaccine.  The updated formula promises to build up your immunity against the original coronavirus variant, plus the omicron strains.

Dr. Robert Wachter chairs the Department of Medicine at UC San Francisco.

<p>The United Kingdom has become the first approve a new-and-improved version of Moderna's COVID vaccine.  The updated formula promises to build up your immunity against the original coronavirus variant, plus the omicron strains.</p>
<p>Dr. Robert Wachter chairs the Department of Medicine at UC San Francisco.</p>

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