Travel in Latin America
Medical
Medical care in Peru at private clinics is fine, you'll have nothing to worry about if you need to go to the hospital. Clinics and hospitals are clean and have modern equipment. Often doctors have studied in foreign countries and have come back to Peru to work. You can always check and see if your doctor is qualified by going to the Colegio Medico del Peru. Then on the left go to Servicios and Conoce su medico. Doctors must be registered with the CMP in order to legally practise medicine in Peru.
Vaccinations
You are not required to have any vaccinations unless you go to the jungle, where Yellow Fever is required. However, some countries require you to have vaccinations to enter their country if you are coming from Peru, for example, Australia requires you to have Yellow Fever even if you haven't visited the jungle.
Some recommended vaccinations to have are Hepatitis, Tetanus-Diptheria, Typhoid, and Yellow Fever. Malaria can be contracted in the jungle, however, the medicine take to prevent it can produce similar symptoms as the actual disease.
Medicines
Many medicines, including birth control, are cheaply available over-the-counter. Medical insurance is around 200 soles a month.
Anti-Conception Medicine
Condoms are readily available here, so please use them. Good brands are Durex and Piel. As far as pills go, Yasmin (About 45 soles) is an international brand. AIDS, HIV and STDs are big problems here. Abortions are illegal, however, you can get them illegally, though I wouldn't recommend it for safety reasons. The morning after pill is available at some pharmacies.
Clinics
The following have English speaking doctors on staff.
Clinica Anglo Americana, Clinica Javier Prado, Maison de Sante, Clinica San Borja, Clinica San Felipe, Clinica Tezza, Clinica Santa Isabel
Sharon de Hinojosa (naturegirl321) has lived and worked (mainly teaching English) in the US, Scotland, Spain, the Czech Republic, China, Korea, and Peru. As well as teaching short-term in Venezuela and Taiwan.
She has created The LA Job List http://www.thelajoblist.blogspot.com which lists schools, institutes and universities in 19 Latin American countries which offer English teaching positions.
Since living in Peru since August 2006, she wrote The Ultimate Peru List http://www.theultimateperulist.blogspot.com With 60 pages it's a comprehensive guide for those living in or moving to Peru.