Host Genetic Analysis Should Be Mandatory for Proper Classification of COVID-19 Reinfections. - Pérez-Lago, Laura; Machado, Marina; Herranz, Marta; Sola-Campoy, Pedro J; Suárez-González, Julia; Martínez-Laperche, Carolina; Comas, Iñaki; Alcalá, Luis; Catalán, Pilar; Muñoz, Patricia; Viedma, Darío García de; Group, Gregorio Marañón Microbiology-ID COVID-19 Study (Open Forum Infectious Diseases, 2021)