A new Canadian study suggests that warm weather is unlikely to have an impact on the spread of Covid-19. The study was conducted by the University of Toronto and published in the Canadian Medical Association journal. The study looked at 144 different regions around the world in late March with differing levels of humidity, latitudes and public health measures. Researchers concluded that there was little or no link between infection spread and temperature or latitude and only a 'weak association' with humidity. Researchers, however, cautioned that there were considerable limitations to the study including discrepancy in actual rates of Covid-19 infections. Since most of the world’s population has no immunity to the virus, it doesn’t need favorable conditions, authors said.