美官员：隔离埃博拉志愿者会有副作用

A top U.S. medical official has warned that mandatory quarantines of health care workers returning from Ebola-affected parts of West Africa could discourage people from volunteering in the region.

Dr. Anthony Fauci, the director of the U.S. National Institute of Allergy and Infectious Diseases, told cnn's State of the Union program Sunday that the best way to protect Americans is to stop the outbreak in Africa, and one of the best ways to do that is to help health workers who go there, rather than take measures that may "disincentivize them from going."   

His comments follow new quarantine policies being imposed by three U.S. states.  New York, New Jersey and Illinois have imposed a mandatory three-week quarantine for anyone returning from West Africa who had exposure to Ebola patients.

New Jersey Governor Chris Christie defended his state's quarantine, calling it necessary "to protect the public health of the people of New Jersey."

Meanwhile Sunday, the U.S. ambassador to the United Nations, Samantha Power, arrived in Guinea's capital Conakry as part of a mission to assess the global response to the epidemic in West Africa.

Power says she hopes to gain a better understanding of what resources are missing so she can push other countries to offer more help.

From Guinea, Power will visit Sierra Leone and Liberia. The three nations account for the majority of the nearly 5,000 deaths from the Ebola virus.