The "Nobel Season" opened with the announcement of the winners in the field of medicine, but do you know who the top 10 countries have won the Nobel Prize for Medicine?

The American Karolinska Institute in Stockholm announced on Monday that the Americans have won the Nobel Prize for Medicine in 2019, William Kyleen, Greg Siemensa and British Sir Peter Ratcliffe.

The award committee said knowledge of these mechanisms is important for the treatment of many diseases, adding that the discovery paved the way for very promising strategies to combat anemia, cancers and many other diseases.

"The intrinsic importance of oxygen has been known for centuries, but the process of adapting cells to fluctuations in oxygen has remained a mystery for a long time," the Nobel Council at the Karolinska Institute said. He said this year's Nobel Prize rewards work that "has revealed the molecular mechanisms responsible for adapting cells to the volatile oxygen level" in the body.

The prize, worth about 9 million Swedish crowns (more than $ 900,000), will be divided equally among the three scientists.

First prize
The first Nobel Prize in physiology or medicine was awarded in 1901 and has since won 216 people, including 12 women.

Last year, two American immunologists James Allison and Japanese Tasco Hongo won the award for their work on discovering new cancer-fighting technologies.

According to the Nobel Foundation, the United States ranks first in terms of winning the prize, scoring 100 wins.

In second place, the United Kingdom scored 30 wins, followed by Germany (17 wins), France (11) and Sweden (8).

Australia, Switzerland and Austria each won seven times, followed by Denmark and Italy five times.