Researchers in the article say it's hard to get reliable data, and that South Africa had been hard hit. I wonder how well the infection rate correlates with the

Researchers in the article say it's hard to get reliable data, and that South Africa had been hard hit. I wonder how well the infection rate correlates with the latitude and this average temperature. We see seasonality in USA, Europe, etc as it spikes in winter and is less prevalent in summer. Is this why Egypt only reports 1000 cases/day and Indonesia 400/day? Or is it that public health infrastructure isn't capable of accurate reporting?