Mexicali is no safer than TJ. Most of Mexico has been experiencing problems with kidnappings of wealthy Mexicans that are held for ransom. The doctors in TJ are not on strike, they are still doing surgeries. As long as you go to a hospital and stay away from the private clinics, you'll be safe. Because of the previous striking of doctors all over Mexico, the government has actively beefed up security, especially near the large hospitals. I would be afraid to go to one of the surgeons that work in small or private clinics because they are much more likely to be targeted.