The city is making some H1N1 flu vaccines available this weekend.

Health officials say clinics will be set up to vaccinate residents in high-risk groups, including pregnant women, residents between the ages of four and 24 and anyone who lives or cares for infants under six months old.

Those who suffer from asthma, diabetes and heart or lung conditions will also qualify.

Health care workers who cannot get the vaccine through their employer are eligible as well.

Anyone under 18 must have a signed parental consent form and anyone under 16 must be accompanied by a parent or guardian.

To find a flu clinic near you, call the city's information hotline at 311 or visit nyc.gov/flu.

Meanwhile, there's word some people in North Carolina have a strain that's resistant to one of the drugs used to fight the virus.

The Centers for Disease Control say that four patients at Duke University Medical Center tested positive for the type of H1N1 flu resistant to Tamiflu over a six-week period -- the biggest cluster seen in the United States so far.

Health officials say they're looking for signs that the virus is mutating, which would make flu drugs ineffective.

More than 50 resistant H1N1 cases have been reported around the world since April, including 21 in the United States.