Why was medieval medicine so slow to change?

The Church discouraged challenges to Galen

What did Andreas Vesalius contribute during the Renaissance?

He corrected Galen's anatomy through dissection

That the heart pumps blood around the body in one direction

The true cause of disease was still unknown

Councils to provide clean water, sewers and sanitation

Fleming discovered it; Florey and Chain mass-produced it

It was free at the point of use, funded by taxation

14questions. Pick an answer and you'll see why right away.

Which theory dominated medieval ideas about the cause of illness?
Why was medieval medicine so slow to change?
Roughly what fraction of England's population did the Black Death kill in 1348 to 1349?
What did Andreas Vesalius contribute during the Renaissance?
What did William Harvey prove in 1628?
Why did everyday treatment change little in the Renaissance?
What did Edward Jenner develop in 1796?
Who published germ theory in 1861?
What did James Simpson introduce to surgery in 1847?
What did Joseph Lister introduce to surgery from 1865?
What did the 1875 Public Health Act require?
Who discovered penicillin in 1928, and who later mass-produced it?
What was the key feature of the NHS founded in 1948?
Which is the strongest candidate for the biggest turning point in medicine?