Here are the corrections to the document:
1. The premiere of the film "Sicko" was in 2007, not its debut.
2. When referring to the patients who went to Cuba, it's better to say "American patients" rather than "American's ill persons" for clarity.
3. The word "theme" should be "them" in the sentence "18 thousand of theme died every year".
4. "Cuba's doctors" rather than just "doctors" to specify these were Cuban doctors.
5. Removed the unnecessary comma in "without any health or insurance policy".
6. Changed "congressman" to "congressmen" to be gram