WHO chiefs compiled the list of nine pathogens, and Covid-19 is included, which are labelled as "priority diseases" for scientists to prepare humanity's defences.Experts describe the diseases as ones which pose the "greatest public health risk", either due to their "epidemic potential" or lack of countermeasures against them.Coronavirus is currently public enemy number one as it continues to sweep across the world, killing almost 2.5million people so far and infecting more than 112million.But other diseases on the list are also deadly and could post a threat unless action or preventative measures are taken.Some of the horror infections can make your brain swell, leave you bleeding out of your eyes, cause deafness and trigger shrunken head.