About the Covid-19 category

An other possible limitation to consider, if the COVID patients and the non-COVID patients come from different datasets, the neural network may learn to distinguish the origin of the images instead of the diagnosis.

COVID19 Chart - Compare and see how the corona virus is spreading in different countries on a daily basis (daily cumulative data from WHO Situation reports), So far some countries are doing very well.

https://covidchart.github.io/

True indeed.