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Zika is part of the flavivirus family; which includes dengue, West Nile and yellow fever.
The virus was first identified in 1947 in Uganda, and a few cases in other parts of Africa and Asia followed. Larger outbreaks were seen in Micronesia in 2007, French Polynesia in 2013 and Brazil in 2015.
Zika is spread by sexual intercourse and blood transfusion. A pregnant woman infected with the virus can also pass it to her unborn child. However, the primary source of transmission is via mosquito bite.
Female mosquitoes require mammalian blood to produce eggs. After a female mosquito bites someone already infected with zika, it spreads as the mosquito bites more people during its three to four-week life span. When a mosquito bites, it injects its saliva containing an anti-coagulant to stop blood from clotting as it bites. The saliva transmits the virus from the mosquito to you.
Aedes aegypti (yellow fever mosquito) is the primary carrier of zika, however, researchers have identified Aedes albopictus (Tiger Mosquito) as another potential carrier. These are the same biters that carry dengue, chikungunya and yellow fever.
Since 2015, the virus has spread to 60 countries and territories across the world.
The Aedes aegypti mosquito likes warmth and is typically found where temperatures remain above 50°F (10°C.). Its territory is at latitudes between 35° north and 35° south, stopping at 3280ft (1000m) above sea level.
Affected regions include:
Currently, there is no vaccination available for zika virus.
Symptoms last from a few days to a week.
Typically, zika presents similarly to dengue fever and chikungunya such as muscular aches, joint pains, fever, headache and skin rash. Some sufferers also develop conjunctivitis. Most of the time, symptoms are mild, with the majority of people presenting as asymptomatic. Severe illness is very rare. Pregnant women are at significant risk if traveling in regions where zika is present. Obstetric monitoring for microcephaly will be needed.
Treatment for zika is limited to treating the symptoms present plus pain relief, hydration and rest. If you feel unwell, seek medical assistance to ensure you are treated correctly and promptly. If you're in a country where the standard of health care may be poor, contact your travel insurer for assistance.
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