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Zika infection is caused by Zika virus (ZIKV) transmitted by the bite of an infected Aedes mosquito. The disease can be asymptomatic, but in those that do experience symptoms, ZIKV infection causes fever, rash, headaches, muscle and joint pains and conjunctivitis. Outbreaks have occurred in many countries of the world, including the Pacific islands. In 2015, the first case of ZIKV infection to occur in Brazil was reported.
A possible link between exposure to ZIKV in pregnancy and microcephaly (a birth defect where the baby’s head is smaller than expected) and other birth defects.

Diphtheria remains a serious disease throughout much of the world. Large outbreaks of diphtheria have occurred in the past due to unimmunised or inadequately immunized people groups of people. Some cases can be mild while more severe cases can lead to death.

After entering the body, the bacterium spores germinate and produce toxins which affect the nervous system. Tetanus is sometimes referred to as "lockjaw" due to the spasms of the nerves.

This air-borne disease is a major public health concern in many countries and vaccination is recommended for healthcare workers and other long term travellers going to live or work in areas of risk

This disease is a virus infection of the liver. There are steps travellers can take to avoid catching Hepatitis B

It is a virus infection of the liver and common in areas where sanitation and water is inadequate. There are steps travellers can take to prevent the spread of Hepatitis A

This is one of the most lethal viral diseases which infects both monkeys and humans. There is a specialist preventative vaccine available from Worldwise clinics, and awareness of sensible mosquito avoidance is advised.

Closely associated with poor hygiene and sanitary conditions, this disease is prevalent in developing countries. There are steps travellers can take to prevent the spread of Typhoid.

The disease is a self-limiting one, lasting from two to six days and considered to be caused when the normal environment of the bowel is upset with exposure to new foods, diet and organisms. It is particularly common in developing countries where sanitation is poor.

Cattle, sheep and goats are the primary carriers of the bacteria causing this infection. There is a preventative vaccine for this disease, usually recommended and often required for travellers going to work or visit rural areas with animals, abattoirs, meat plants, cattle stations etc.