The Royal Society was the centre of research into new theories and technology. Encouraged challenging ideas and discovering things on your own.
Royal Society focused on sharing ideas exposing people to new technology making new scientific ideas easy to learn about helping medicine progress.
The Royal Society published their journal 'Philosophical Transactions'.
The invention of the printing press in the 1470's increased the rate of of progress in medicine as new ideas were spread and challenged more easily. Existing theories were more widely available so were also challenged.
Before the printing press books would take months to produce so were rare and precious. Only widely accepted ideas were made.
Galen became less reliable as his theories were printed in different versions making his original idea unclear during the Renaissance.