To enter Vietnam, you have to apply for a Visa before. The visa can be ordered at the Vietnamese Embassy of your country. You must fill out a visa form and enclose the passport and money. The issuing of the visa lasts about 1-2 weeks.
There are no vaccination requirements, unless you travel from a yellow fever infection area. However, some doctors recommend vaccinations against diphtheria, tetanus, polio, measles and hepatitis A. In the tourist areas is the malaria risk virtually at zero, so you don't need a malaria prophylaxis. For more information click here.
Vietnam is a very safe country, generally also unaccompanied women need not to worry about their personal safety. The greatest risk is probably the traffic, in particular in the cities. In Hanoi and Saigon, crossing the street is sometimes like a dare: as a pedestrian you to struggle yourself through multiple tracks of constantly passing mopeds. We can advise you on the "unofficial" rules of the road, so you can safely get through these situations.
Official currency is the Vietnamese Dong (VND). Conversion rate is about one to 22'000, i.e. 100 USD correspond to approximately 2 million dong. Don't get confused by the many zeros on the bill! Some notes look similar, so you might mix them up when paying.
ATMs for Visa, Master and Maestro are ubiquitous, so you don't really need to import cash. Cash withdrawals are usually up to 4 million dong to the piece (approx. 200 USD). US dollars are not the official means of payment, but are sometimes accepted in tourist establishments. For all travelers we would recommend a reserve of approximately US$ 100 in small denominations.
A free WIFI will be available in most hotels and also many restaurants. The coverage with wireless networks is much higher than in Europe, it is therefore very convenient to carry mobile devices such as Smartphones or tablets to travel. If you don't want this, you will also find a computer with free Internet access in most hotel lobbies. The classic Internet Café has nearly disappeared in recent years.