Pérez Gilaberte, Juan Blas Martín Iranzo, Natalia Aguilera, José Almenara Blasco, Manuel de Gálvez, María Victoria Gilaberte, Yolanda Correlation between UV index, temperature and humidity with respect to incidence and severity of COVID 19 in spain Int. j. environ. res. public health 10.3390/ijerph20031973 2023 2023