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2

It seems that there is a correlation between exposure to and surviving the plague and a genetic predisposition against infection with HIV that has a prevalence in Northern Europe that is not observed in Southern Europe: http://www.pbs.org/wgbh/evolution/library/10/4/l_104_05.html


2

When I traveled Krakow last month, the tour guide explained Black Death affected less in Poland because they had life style sanitizing dishes with vodka.


3

One factor to consider also is that Poland had a much smaller population than western Europe. Around the time of the black death, the polish population was something like 2-3 million, while the French population was about 14 Milton or even higher. It's common sense that disease spreads easier in higher population density areas, especially when hygiene was ...


13

There are three types of plague, Pneumonic, Bubonic, and Septicemic all of which are caused by the bacterium Yersinia pestis. People infected by fleas get the bubonic form of the plague. However, if the bacteria reaches the lungs, it becomes pneumonic plague which is more virulent spreading via person to person by coughing then no rats are needed since the ...


61

Poland wasn't actually "spared", it was merely less affected than the rest of Europe. That graphic is incorrect (or rather, incomplete), since a substantial number of both Poland and Milan's population did in fact die of the plague. Their death rates were only "low" in comparison to the rest of Europe - if it happened today, it would be horrifying to us. ...


-2

No rats. Endemic plague only persists in areas infested with rats, which occurred in urbanized areas of Europe, because people were throwing garbage into the streets. In well-kept countrysides there was no plague, because there was not enough rats. Poland was an agricultural country centered around manors, not large cities, hence no rats. Note that to be ...


9

These guys in Nepal carry loads up to about 85kg per porter. The "backpacks" are actually wooden frames for weaved baskets, held together with ropes. This technology was already widely available much before medieval times. Any specific piece of luggage, then as now, had its own breaking point, but since this is way before standardized production in high ...


21

The historical answer is pretty much the same as the answer that you got on RPG - it depends on the type and construction of the pack. These ranged from simple cloth bags designed to be worn on the back, such as this one from one of the panels at the church of St.Wolfgang in South Tirol, Austria... ...to full on back boards and baskets made from wood and ...


3

Given that they had canvas and leather, I don't think there were any technological caps on the carry weight of a backpack. Better to look at what a human can carry comfortably for a prolonged time, which seems to be 20-30% body weight if you browse a hikers' forum. That's with a modern backpack, of course. I had a look and couldn't find whether backpacks ...



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