“The Vatican is very well aware of the seriousness of this issue, and the Holy Father is very aware of it,” Father Rosica said. “We’re waiting to see how the local churches in those countries respond.”

But Father Rosica said church teaching on abortion and contraception remains the same. The Zika epidemic, he said, presents “an opportunity for the church to recommit itself to the dignity and sacredness of life, even in very precarious moments like this.”

The five countries in Latin America and the Caribbean that have advised women to delay pregnancy are Brazil, Ecuador, El Salvador, Colombia and Jamaica. But access to contraception is limited throughout the region, especially for poor and rural women. Abortion is restricted in many countries, and it is illegal without exceptions in the Dominican Republic, El Salvador and Nicaragua, according to the Kaiser Family Foundation.

The Zika virus is spread by mosquitoes of the Aedes genus, but researchers have found some cases transmitted by sexual contact. Experts are not yet sure whether Zika is the cause of a sudden surge in babies born in Brazil with microcephaly — unusually small heads and, often, damaged brains. Microcephaly could lead to serious disabilities — but not always.

There is no vaccine for the Zika virus, and no cure for microcephaly. The World Health Organization this month declared the Zika epidemic an international public health emergency. The organization advised that women should have full access to a range of contraceptive options, as well as “safe abortion services to the full extent of the law.”

Many church officials are wary that the Zika epidemic will lead to the loosening of laws on abortion and contraception. Cardinal Óscar Rodríguez Maradiaga of Honduras, who serves on Pope Francis’ nine-member advisory council, denounced the notion of “therapeutic abortions” for women carrying babies with microcephaly. He spoke at a Mass attended by the Honduran president and first lady.