class=”imagewrap has-source-dimensions”
data-crop-type=”wide”
style=”
–source-width: 6026;
–source-height: 3390;
”
>

Security personnel stand guard outside the Wuhan Institute of Virology during the February 3 visit of the World Health Organization team investigating the origins of the SARS-CoV-2, the virus that triggered a pandemic.
Hector Retamal /AFP via Getty Images
hide caption
toggle caption
Hector Retamal /AFP via Getty Images