The 2016 Olympic Games in Rio de Janeiro could spark a “full-blown public health disaster”, doctors have warned.

Since the Zika virus was first identified in Brazil in May 2015, the disease's spread through Latin America has been declared a health emergency by the World Health Organisation and the number of suspected cases in Rio is the highest of any state in the country.

The continued presence of the virus ahead of the summer Olympics has caused athletes and health specialists to question the risks involved in allowing the Games to go ahead with hundreds of thousands of spectators travelling to the city.

What is Zika virus?

Writing in the Harvard Public Health Review, Dr Amir Attaran said the Games could speed up the spread of the virus, and suggested the Games could be hosted by another city in Brazil where the illness is less of a threat.

He said: “While Brazil's Zika inevitably will spread globally, given enough time – viruses always do – it helps nobody to speed that up.

"In particular, it cannot possibly help when an estimated 500,000 foreign tourists flock into Rio for the Games, potentially becoming infected, and returning to their homes where both local Aedes mosquitoes and sexual transmission can establish new outbreaks.

Battling the zika virus - in pictures Show all 19 1 /19 Battling the zika virus - in pictures Battling the zika virus - in pictures A worker of the Salvadorean Ministry of Health fumigates a house in Soyapango, 6 kilometers from San Salvador, El Salvador. Salvadorean authorities have began a three days campaign of fumigation to reduce the presence of the mosquito that transmit the Zika virus. EPA/Oscar Rivera Battling the zika virus - in pictures A Health Ministry employee fumigates a home against the Aedes aegypti mosquito to prevent the spread of the Zika virus in Soyapango, six km east of San Salvador. Health authorities have issued a national alert against the Aedes Aegypti mosquito, because of the link between the Zika virus and microcephaly and Guillain-BarrÈ Syndrome in foetuses. AFP PHOTO/Marvin RECINOSMarvin RECINOS/AFP/Getty Images Battling the zika virus - in pictures A pediatric infectologist examines a two-months-old baby, who has microcephaly, on 26 January 2016 in Recife, Brazil. Getty Images Battling the zika virus - in pictures A woman walks through the fumes as Health Ministry employee fumigate against the Aedes aegypti mosquito to prevent the spread of the Zika virus in Soyapango. Marvin RECINOS/AFP/Getty Images Battling the zika virus - in pictures A health ministry employee sprays to eliminate breeding sites of the Aedes Aegypti mosquito, which transmits diseases such as the dengue, chicunguna and Zica viruses, in a Tegucigalpa cemetery on January 21, 2016. The medical school at the National Autonomous University of Honduras (UNAH) recommended that women in the country avoid getting pregnant for the time being due to the presence of the Zika virus. If a pregnant woman is infected by the virus, the baby could be born with microcephaly. AFP PHOTO/Orlando SIERRA Battling the zika virus - in pictures A man walks away from his home with his son as health workers fumigates the Altos del Cerro neighbourhood as part of preventive measures against the Zika virus and other mosquito-borne diseases in Soyapango, El Salvador REUTERS/Jose Cabezas Battling the zika virus - in pictures A three-months-old, who has microcephaly, in Recife, Brazil. Getty Images Battling the zika virus - in pictures A pregnant woman waits to be attended at the Maternal and Children's Hospital in Tegucigalpa. The medical school at the National Autonomous University of Honduras (UNAH) recommended that women in the country avoid getting pregnant for the time being due to the presence of the Zika virus. If a pregnant woman is infected by the virus, the baby could be born with microcephaly. ORLANDO SIERRA/AFP/Getty Images Battling the zika virus - in pictures Army soldiers apply insect repellent as they prepare for a clean up operation against the Aedes aegypti mosquito, which is a vector for transmitting the Zika virus in Sao Paulo, Brazil. AP Photo/Andre Penner Battling the zika virus - in pictures Workers disinfect the Sambadrome in Rio de Janeiro to fight the spread of the Zika virus Battling the zika virus - in pictures Dr. Vanessa Van Der Linden, the neuro-pediatrician who first recognized the microcephaly crisis in Brazil, measures the head of a 2-month-old baby with microcephaly in Recife Battling the zika virus - in pictures Mother Mylene Helena Ferreira cares for her son David Henrique Ferreira, 5 months, who has microcephaly, on January 25, 2016 in Recife, Brazil. In the last four months, authorities have recorded close to 4,000 cases in Brazil in which the mosquito-borne Zika virus may have led to microcephaly in infants Getty Images Battling the zika virus - in pictures U.S. women who are pregnant from traveling to many South American countries Battling the zika virus - in pictures In the last four months, authorities have recorded close to 4,000 cases in Brazil in which the mosquito-borne Zika virus may have led to microcephaly in infants. Getty Images Battling the zika virus - in pictures Dr. Vanessa Van Der Linden, the neuro-pediatrician who first recognized the microcephaly crisis in Brazil, examines a two-month-old baby with microcephaly on January 27, 2016 in Recife, Brazil Battling the zika virus - in pictures Washington Post Battling the zika virus - in pictures Battling the zika virus - in pictures Battling the zika virus - in pictures

“All it takes is one infected traveller, a few viral introductions of that kind, in a few countries, or maybe continents, would make a full-blown global health disaster.”

With less than three months to go until the Games begin on 5 August, it is unlikely the continued presence of the virus will cause officials to take drastic action.

However, the warning will be yet another blow to Brazilian authorities, who are already mired in a string of controversies that have undermined confidence in the country’s ability to host the Olympics.

Brazil is currently grappling with steep economic decline, while a continuing presidential impeachment attempt alongside the country’s largest ever corruption scandal has caused national outrage.