What we know: World Health Organization declares global emergency over Zika virus

On Monday, the World Health Organization declared the spread of Zika virus an worldwide public health emergency.

Originally from Africa, Zika spread to Asia and was first registered in Brazil in the middle of a year ago, spreading like wildfire through the northeast thanks in part to the region's widespread poverty, equatorial heat and chronic infestations of the Aedes aegypti mosquito, which also spreads dengue fever and chikungunya.

Since December 16, when the first case of the mosquito-borne virus was detected, there have been 3,649 cases of people infected with the virus, said Health Minister Yolani Batres.

Garin said the public must keep in mind the 4S against Zika virus, which stands for Search and destroy mosquito breeding places; use Self-protection measures; Seek early consultation for fever lasting more than two days; and Say yes to fogging when there is an impending outbreak.

This is to note that in 2014, a global public health emergency like this was declared by United Nations in regard with Ebola outbreak in West Africa.

Medical officials have not yet established the relationship between Zika virus infection and birth deformities and neurological syndromes, but say it's strongly suspected.

Currently, more than 2,100 pregnant women have been affected with the virus in the country.

New South Wales Health has confirmed a woman and a man in Sydney were infected with Zika virus after travelling to Central America. They said there was no risk to athletes and spectators, except pregnant women, at the August event.

Cezar also warns that more than 220,000 other health workers could later join them in a nationwide stoppage. The virus has been linked to birth defects.

The health department said the residents had mild cases of the virus and have since recovered.

In Brazil there have been some 4,000 cases of the condition reported since October.

The World Health Organisation says that it expects three to four million cases in the Zika pandemic.

"For situations like this, you have to essentially have a "no regrets" policy", he said.

In particular, this is an opportunity for expertise to be shared across the globe, for research money to be directed to diagnostics and vaccine development and for an increase in global aid money required to control mosquito populations in some of the poorer affected countries. "Maybe this will be a false alarm when more information is available months later, but it's serious enough on the evidence we have right now that we have to act".

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