Rudolf Weigl, seen in the Google Doodle, was an inventor and immunologist from which country?

Q. Rudolf Weigl, seen in the Google Doodle, was an inventor and immunologist from which country?
Answer: Poland
Notes:

Google celebrated the 138th birthday of Polish inventor, doctor, and immunologist Rudolf Weigl with a doodle.
He had produced the first-ever effective vaccine against one of the oldest and most infectious diseases, named ‘Epidemic typhus’.
His work has been honored by two Nobel Prize nominations.
Weigl adapted Body lice into a laboratory specimen. In 1936, Weigl’s vaccine successfully inoculated its first beneficiary.

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