Yersinia pestis.
a rat bites into its host and the infection starts to spread
It affected them because the doctors stopped attending the patients that has buboes ( black death infection). And they died after three days
the fleas would jump from people to people spreading the infection.
Black Death was caused by Yersinia pestis bacterium. It caused them bloody vomit fever and tumors.
To kill the remaining living viruses and bacteria.
if you got infected with the black death the infection would go into your bloodstream in which case causing the pus to be black.
Because they were lucky enough to survive and they kept away from the people who had the infection.
The infection was usually found in either your groin or armpits. After that it spread to your thighs and arms.
Yes severe infection like septicaemia can sometimes cause death
Black Death Plague caused bloody vomit fever and tumors. People died within week of infection.
Not very much. The Black death is caused by a bacteria and the swine flu by a virus. The Black death caused 15 million deaths world wide but people never heard about bacteria before and had no means to stop it (an antibiotic). The flu also causes deaths today but we do have a vaccine and it can be prevented. The Black Death infected the lymph system. The flu causes a severe upper respiratory infection.
This is a fungal infection known as Canna rust caused by Puccinia thaliae. Smoke that and your death is pretty well ensured.