Population-based virucidal phthalocyanine gargling/rinsing protocol to reduce the risk of coronavirus disease-2019: a community trial - Brito-Reia, Verônica Caroline; Bastos, Roosevelt da Silva; Vilhena, Fabiano Vieira; Honório, Heitor Marques; Alves, Lucas Marques da Costa; Frazão, Paulo; Santos, Paulo Sérgio da Silva (GMS Hygiene and Infection Control, 2022)