Depends on the specialty. I really like Nejm (New England Journal of medicine), Ajnr (American Journal of Neuroradiology), radiopaedia.org, Nature, Circulation, the list goes on. Yes, these are English-language resources, but I believe that doctors must know English, because they must be at the forefront of medicine, learn all the news of medicine as early as possible. From Russian-speaking I read humbio and Biomolecule, because the authors of these resources - specialists. I don’t understand at all how medical and biotechnology articles can be written by copywriters. If there is no indication of the authors - honey. specialists in the section About the site or About the project on any resource, or ordinary journalists are indicated there, I immediately close the article and look further.
Uptodate.com is the largest knowledge base in all areas of medicine. Subscription discounts for students / residents. An amazingly handy thing - there is an application on the phone: all the information with links to sources. What is very correct, there are separate sections "for patients" where information is presented in simple language.
If something is very "narrow", then PubMed, usually it concerns clinical trials.
What an interesting first answer. I will say for myself. I will not be original. This is of course
American Academy of Family Physicians represents more than 115,900 family physicians, family medicine residents, and medical students.
There are many more good sites out there, but these are the two I turn to first for help.