Zika Virus (image) Fundação de Amparo à Pesquisa do Estado de São Paulo Share Print E-Mail Caption Sylvatic cycle would give virus a natural reservoir from which it could more frequently reinfect humans. Study on subject has been published by Brazilian researchers in Scientific Reports. Credit Scientific Reports Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.