Hold on before getting prescriptions for antibiotics like Ciprofloxacin or any other higher line Fluoroquinolones or antibiotic. For one thing, I'd like to know how you will know the difference between what they might be affective against, and what they won't touch, such as a virus, and how to correctly diagnose your condition. I have no idea what they might do for parasitic infections, most likely not a thing. Would you get multiple courses, or just take a few and then stop since the symptoms went away? If you take a strong antibiotic, one side affect that can occur in any region of the world, is severe colitis and diarrhea, resulting from the death of the gut's native flora and over growth of yeasts in the colon. If you took it for something like a viral diarrhea, you now have continued diarrhea and a new problem. Plus, you never needed the medication in the first place. Imodium, or Loperamide, pretty much just treats the symptoms of the diarrhea, while constipation is a side effect, you should still drink plenty of (*clean*) water while taking it, and eat normally (if you have an appetite) including foods high in fiber. Same thing for Upper Respiratory Infections. How will you know you have a viral infection, or a bacterial pneumonia, a bacterial bronchitis, or a Tuberculosis? Cipro is not effective against TB, and TB requires long term treatment, not a 10 day course of meds.
If you are not capable of diagnosing various types of infections you really shouldn't have one specific med to treat all things. That is why providers, hospitals and clinics exist. I'm not accusing anyone here, but if you aren't able to buy local insurance or prepared to pay out of pocket for local health care, don't go. If you are going to a region with low standards of care, or limited care, be aware that the risk to outsiders may be high and any diseases contracted may result in a long period of suffering before you can receive effective treatment, or death. I'm not trying to scare anyone, but simply taking a medication for any reason can be completely infective.
Having a few medications like an anti-diarrheal, an anti-inflammatory like Tylenol or Naproxene, or some Tums for stomach upset, is very different from taking antibiotics to treat (with questionable efficacy) any potential infections.
You can't control others around you, but hand hygiene and doing your best to drink clean water are the best strategies. Sanitizers, soap and water, and chlorine tablets can go a long way.
I think Monsoon season will begin around June 20, plus or minus 5 days, not by the calendar according to the NWS, but when dew points rise dramatically, and it begins to rain over the Sacramento Mountains. It will start about 10 days later in Arizona.