Berumen, Jaime, SCHMULSON, MAX, Guerrero, Guadalupe, Barrera, Elizabeth, Larriva-Sahd, Jorge, Olaiz, Gustavo, García-Leyva, Rebeca, Wong Chew, Rosa, Betancourt-Cravioto, Miguel, Gallardo, Hector, Fajardo-Dolci, Germán, AND Tapia-Conyer, Roberto. " Trends of SARS-Cov-2 infection in 67 countries: Role of climate zone, temperature, humidity, and curve behavior of cumulative frequency on duplication time" Medical Research Archives [Online], Volume 8 Number 9 (21 September 2020)