THREE more patients who are under observation for possible influenza A (H1N1) or swine flu virus infection were cleared by health authorities Friday.

Davao Medical Center (DMC) chief Dr. Leopoldo Vega said Saturday that a Dutch national, a missionary from Korea, and a 21-year-old female from Thailand all tested negative of the H1N1 virus.

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He said as of Saturday, only one patient -- a 31-year-old seaman -- is under observation at the DMC isolation ward.

Another teenager who refused to be admitted at the DMC isolation ward but preferred to go on a self-quarantine is being monitored by health authorities.

Vega said they still have to get the results of the tests made on the teenager and the seaman.

"I think we have 14 cases observed in our isolation room since the virus was discovered," he added.

To date, the total number of confirmed H1N1 cases in the country is pegged at 29.

Since May 1, the Department of Health has monitored a total of 401 cases. Of these, 29 tested positive for H1N1, 78 have pending laboratory results, while 301 are negative.

There are 56 new cases under observation (CUOs) as of Thursday, including the four from Davao City.