It is common for cattle of the area to be carriers of o certain virus, that produces an intestinal disease known as Giardea. The Inca Trail is basically a safe route, although there are some stretches with some rather precarious precipices. If you want to properly take in the scenery, you are advised to stop, so as to avoid any distractions that might lead to accidents. You really should not ever leave the trail as it very easy to get lost or disorientated. You are advised not to camp among or near the ruins, and to be careful when you light a fire.
Forest fires are a definite liability in the area.
Leave nothing but your footprints. Taking two pairs of sports shoes or trekking boots can also be a great help. You will also need a sleeping bag, a mat and o small knapsack for your personal belongings as well as a big duffle bag or a rucksack to carry all of this. Flight to Lima Flight arrival, reception and escorted transfer to your hotel. Early transfer to the airport to board your flight to Cuzco, the archaeological capital of America.