. 2022 May 25;13(2):681–721. doi: 10.3982/QE1618
Published 2022. This article is a U.S. Government work and is in the public domain in the USA.
This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.
Figure 7.
Waiting for a vaccine.