VILLAR, Livia Melo, Vanessa Salete DE PAULA, and Ana Maria Coimbra GASPAR. 2002. “ Seasonal Variation of Hepatitis A Virus Infection in the City of Rio De Janeiro, Brazil ”. Revista Do Instituto De Medicina Tropical De São Paulo 44 (5): 289-92. https://revistas.usp.br/rimtsp/article/view/30644.