Ho Chi Minh City, May 19 -- Ho Chi Minh City has moved to strengthen surveillance and preventive measures against the potential spread of Ebola following the World Health Organization's classification of the recent outbreak of its Bundibugyo strain in the Democratic Republic of Congo and Uganda as a public health emergency of international concern. Although the WHO has not recommended imposing international travel or trade restrictions on affected countries, the municipal Department of Health on May 19 issued a directive urging preventive health units not to become complacent in disease monitoring and response efforts. Under the directive, the Ho Chi Minh City Centre for Disease Control has been instructed to tighten surveillance at border ...