Health and safety risks in Argentina are low compared to many other Latin American nations, and taking basic precautions will go a long way toward keeping you out of trouble.
SAFETY
There is little risk of violent crime, even in big cities like Buenos Aires. Pick pocketing, however, is fairly common. By staying away from crowds, remaining conscious of your surroundings and keeping valuables secure (e.g. don’t put your wallet in an open pants pocket), you will typically be able to avoid any problems. Don’t wear a lot of jewelry or flaunt expensive gadgets. Try to take taxis at night, and keep the windows shut and the doors locked. Keep your passport and other important documents in the hotel, and carry copies with you if necessary.
HEALTH
Argentina lacks most of the health risks of other Latin American countries, principally because of its more arid climate. Only in the border zones will you be at risk of contracting serious diseases like malaria and yellow fever.
The Argentine sun is intense, so don’t just save your sunscreen for the beach - put it on whenever you plan to go outside.
Most people don’t have problems with the food and water, but you will almost certainly be eating a lot of meat on your trip, so think twice before ordering any rare steaks. The undercooked meat contains bacteria you may not be accustomed to and poses a bigger threat to your digestion than the average tap water bug.
If you are bringing prescription medications with you, pack them in your carry-on luggage and be sure to keep them in their original containers or they will most likely be confiscated. Bring copies of your prescriptions just in case, and write down their generic names.