Dallas County health officials have reported two more flu-related deaths for the 2017 to 2018 season.

In a statement released Wednesday, officials said a 73-year-old and 80-year-old died from complications after they were diagnosed with the seasonal flu.

Less than one week ago, Dallas County Health and Human Services reported the county's first flu-related death of the season, a 98-year-old resident.

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The county's medical director, Dr. Christopher Perkins, warned residents that older adults, young children, pregnant women and those suffering chronic health conditions are more vulnerable to the illness.

"With influenza activity on the rise, individuals in these groups should take special precaution as we continue throughout the season,” he said.

The county listed five tips to prevent the flu:

• If you haven’t done it already, consider protecting yourself with a flu vaccination

• Cover your cough with a tissue or cough into your sleeve

• Wash your hands and keep your hands away from your face

• Avoid close contact with people who are coughing or appear ill

• Stay home if you are sick or keep family members home if they are sick