Close-up of the bell of a box jellyfish (Cubozoa). Box jellyfish are relatives of true jellyfish, but have a cubic bell and tentacles extending from each lower corner. Unlike true jellyfish they have complex eyes and are active swimmers, avoiding obstacles and chasing after prey. They feed mainly on small fish, which they catch with their stinging tentacles. Some species of box jellyfish have a sting that is rapidly fatal to humans. Filmed in the Gulf of Thailand, near Koh Pha Ngan Island.

Scientist observing Aedes aegypti mosquitoes in Bangkok, Thailand in 2005. This species is a vector (carrier) of several diseases, including dengue fever, chikungunya, Zika fever, Mayaro and yellow fever. Females can transmit the pathogens responsible for these diseases when they feed on mammalian blood. They are found in tropical, sub-tropical and temperate regions worldwide.

Aedes aegypti mosquitoes in a laboratory in Bangkok, Thailand in 2005. This species is a vector (carrier) of several diseases, including dengue fever, chikungunya, Zika fever, Mayaro and yellow fever. Females can transmit the pathogens responsible for these diseases when they feed on mammalian blood. They are found in tropical, sub-tropical and temperate regions worldwide.

Scientist researching a vaccine for dengue fever in Thailand in 2008. The dengue virus (DENV), transmitted by mosquito bites, causes the tropical disease dengue fever in humans. Symptoms can range from a mild fever and joint pain to spontaneous skin bleeding and death due to circulatory failure. It is thought to infect up to 400 million people a year, and lead to around 40,000 deaths a year. Prevention is centred around the elimination of mosquitos, and two vaccine now exist, having been approved in 2016 and 2022 respectively.

Scientist researching a vaccine for dengue fever in Thailand in 2008. The dengue virus (DENV), transmitted by mosquito bites, causes the tropical disease dengue fever in humans. Symptoms can range from a mild fever and joint pain to spontaneous skin bleeding and death due to circulatory failure. It is thought to infect up to 400 million people a year, and lead to around 40,000 deaths a year. Prevention is centred around the elimination of mosquitos, and two vaccine now exist, having been approved in 2016 and 2022 respectively.

Scientist researching a vaccine for dengue fever at the Institute of Vaccine Control in Bangkok, Thailand, 2008. The dengue virus (DENV), transmitted by mosquito bites, causes the tropical disease dengue fever in humans. Symptoms can range from a mild fever and joint pain to spontaneous skin bleeding and death due to circulatory failure. It is thought to infect up to 400 million people a year, and lead to around 40,000 deaths a year. Prevention is centred around the elimination of mosquitos, and two vaccine now exist, having been approved in 2016 and 2022 respectively.

Scientist researching a vaccine for dengue fever at the Institute of Vaccine Control in Bangkok, Thailand, 2008. The dengue virus (DENV), transmitted by mosquito bites, causes the tropical disease dengue fever in humans. Symptoms can range from a mild fever and joint pain to spontaneous skin bleeding and death due to circulatory failure. It is thought to infect up to 400 million people a year, and lead to around 40,000 deaths a year. Prevention is centred around the elimination of mosquitos, and two vaccines now exist, having been approved in 2016 and 2022 respectively.

Aerial view of a train running through central Bangkok, Thailand.

Aerial view of Bangkok, Thailand.

Aerial view of Bangkok, Thailand.

Aerial view of Bangkok, Thailand.

Aerial view of Bangkok, Thailand.