COVID-19 basic reproduction number and assessment of initial suppression policies in Costa RicaLuis Fernando Chaves, Lisbeth A. Hurtado, Melissa Ramírez Rojas, Mariel D. Friberg, Rodrigo Marín Rodríguez and María L. Avila-AgueroMath. Model. Nat. Phenom., 15 (2020) 32DOI: https://doi.org/10.1051/mmnp/2020019