Masks worn during experiments with plague. Manila, Philippines (1912). Original image from National Museum of Health and Medicine. Digitally enhanced by rawpixel.
Green coronavirus under a microscope. Original image sourced from US Government department: Public Health Image Library, Centers for Disease Control and Prevention. Under US law this image is copyright free, please credit the government department whenever you can”.
Doctor hands analyzing Coronavirus COVID 19 test blood Foto: Marco Verch | ccnull.de | CC-BY 2.0
