Impact of sandstorm and carnival celebrations on SARS-CoV-2 spreading in Tenerife and Gran Canaria (Canary Islands, Spain) Laura Tomaino; Jaime Pinilla; Silvia Rodríguez-Mireles; Beatriz González López-Valcárcel; Patricia Barber-Pérez; Antonio Sierra; Carlo La Vecchia; Lluís Serra-Majem;