. 2021 Apr 9;13(2):340–347. doi: 10.3390/idr13020033
© 2021 by the authors.
Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Figure 2.
Frequency of asymptomatic cases per age group.