spread disease

People in the Middle Ages had modern diseases?
US scientists on January 3 published research on medieval bones found in Albania, showing some traces of the disease spread in modern times, causing pain to those who eat avocados.
Virus alarm lethal in the US
About 10,000 people who once went to the famous US national park Yosemite are likely to be infected with Hantavius causing pneumonia syndrome. In which 2 deaths and 4 infected