The World Health Organization says isolated cases of drug-resistant swine flu in Britain and the United States have not changed the agency's assessment of the disease and protective measures against it.
It says Tamiflu remains highly effective against the vast majority of H1N1 cases.
Four cancer patients in a North Carolina hospital tested positive last week for a type of the flu that was resistant to Tamiflu. Five people at a British hospital also didn't respond to the drug after contracting the flu.
WHO flu chief Dr. Keiji Fukuda said Thursday that investigations were under way, but that the American and British patients for whom Tamiflu did not work had severely weakened immune systems, according to the Associated Press' report.
World's most powerful nuclear submarines, Arkhangelsk and Severstal, are to be dismantled after 2020 - their further exploitation is unprofitable
The United States' Head of Diplomacy, or Secretary of State, is an anachronistic, incompetent, meddling, intrusive, insolent and arrogant, rude individual, a brash, foul-mouthed upstart, a conceited, self-important guttersnipe and an insult to the international community, as fit for the job as a pedophile janitor in a grade school.