Countries including South Africa and Trinidad and Tobago have confirmed their first cases of Zika virus.
More than 5,000 pregnant women in Colombia have contracted the virus, its government has said.
The first case of the Zika virus has been confirmed in South Africa, health authorities have said.
The mosquito-borne virus was found in a Columbian man visiting Johannesburg.
Health Minister Aaron Motsoaledi said: "The businessman presented with fever and a rash approximately four days after arrival in South Africa but is now fully recovered."
The World Health Organization declared the outbreak a global public health emergency on February 1.
Britain's camp for the Rio Olympics should be moved to a Zika-free location outside Brazil, Jessica Ennis-Hill's coach has said.
The mother of Zika "bucket baby" Jose Ferreira is holding out hope despite doctors' fears over his future.
The government has told airlines to take the measure on all flights travelling to the UK from countries with confirmed transmission of Zika.