A total of 71 new cases of influenza with complications have been recorded, with four more fatalities, since Tuesday, the Centers for Disease Control (CDC) said.
As of Friday, health officials had confirmed 366 flu cases with complications, 18 of which were fatal, it said.
The latest victims were a five-year-old boy in Taoyuan County, a 62-year-old man in Chiayi County, an 85-year-old woman in New Taipei City and a 74-year-old man in Miaoli County, all of who died after contracting Type B or Type AH3 influenza.
None of the individuals who died had been vaccinated, the CDC said.
The CDC said that even though the number of flu cases was half of that recorded in the same period a year ago, there was still a 5 percent mortality rate.
The Department of Health (DOH) advised those infected with the flu virus to stay at home and avoid public places, especially those at high risk of developing flu-related complications, such as infants, toddlers, the elderly and patients with chronic diseases