1. Coronavirus Resource Centerhttps://coronavirus.jhu.edu/map.html
2. Casos de COVID-19 en Nuevo Leónhttps://www.nl.gob.mx/publicaciones/casos-de-covid-19-en-nuevo-leon
3. Número de Habitantes Nuevo Leonhttp://cuentame.inegi.org.mx/monografias/informacion/NL/Poblacion/default.aspx?tema=ME&e=19
4. The epidemiological characteristics of an outbreak of 2019 novel coronavirus diseases (COVID-19) in China;Zhonghua Liu Xing Bing Xue Za Zhi,2020
5. Epidemiology of COVID-19 Among Children in China