The Archregimancy wrote:Nanatsu no Tsuki wrote:
Last interesting factoid: contrary to the belief that you contracted plague and died shortly after, the reality seemed to be that the disease took 37 days to manifest itself fully. For the first 12 days, you weren't contagious. Then for the next 20 days, you were highly contagious. Then, the last 5-7 days, you manifested the virulent symptoms and died.
Assuming that we're talking about Yersinia pestis-associated plague, I think that rather depended on the type of plague.
Yersinia pestis causes three different types of plague, which are sometimes confused.
The first type is the famous bubonic plague; this has an incubation rate of 2-6 days, with death usually occurring between 10-14 days after infection. This is typically spread by infected fleas. The mortality rate for infected individuals is about 40-60% if left untreated, but several effective treatments exist these days.
The second type is pneumonic plague; while much rarer than bubonic plague, this is the type usually held to be behind stories of apparently healthy individuals suddenly dropping dead, and has a mortality rate of over 90% if left untreated. This is a lung infection typically spread by breathing in infected air droplets exhaled by other infected individuals.
The third, and rarest, type is septicaemic plague. This is a blood infection, typically caused by an open wound coming into contact with infected tissue. Untreated, it has a 100% mortality rate, and treatment has to occur within 24 hours of infection; it can kill within hours of symptoms presenting.
The 'Black Death' was most likely a combination of all three of these; hence the accounts of most of the infected dying after developing the characteristic buboes of bubonic plague, with the stories of previously healthy people dying overnight likely relating to victims of pneumonic plague or speticaemic plague.
Finally, all of that reading about late classical and early medieval plague comes in handy...
Oh darn, beat me to it.