http://www.sciencemag.org/news/2020/10/could-certain-covid-19-vaccines-leave-people-more-vulnerable-aids-virus > CanSino Biologics’s experimental COVID-19 vaccine is one of at least four using an adenovirus that some worry could increase HIV susceptibility. > Science’s COVID-19 reporting is supported by the Pulitzer Center and the Heising-Simons Foundation.