بیماری که قرن ها بشریت را به وحشت انداخت و پیشرفت پزشکی که مراقبت های بهداشتی را برای همیشه با کمک یک گاو تغییر داد.

The disease that terrorized humanity for centuries and the medical breakthrough that changed healthcare forever, with the help of a cow

The recent pandemic shocked the world before modern medicine came to the rescue, but things were a lot worse when smallpox was around.