Viruses can remain infectious on different surfaces for days, and your hands become the vehicle.

The Marion County Health Department requested the temporary visitor restrictions in January when flu activity began to peak.

Liberty Christian School in Anderson says it's cancelling middle and high school classes Thursday and Friday because about half of teachers and one in five students are sick.

The Marion County Public Health department says increased flu activity is likely to last several more weeks.

"It is late, but it's not too late" to get your flu shot, one infectious disease expert says. "But run, do not walk, to get your influenza vaccine, and bring everyone in the family along with you."

So far this season the Indiana State Department of Health has confirmed 79 flu related deaths.

The Indiana State Department of Health says in its latest weekly influenza report that 58 of the deaths have occurred among people age 65 or older.

The Indiana State Department of Health says in its weekly influenza report that flu-related deaths doubled as of the first week of 2018.

Marion County health officials say this season's rate of flu activity and respiratory complaint reports is greater than last season's.

The State Department of Health says 25 flu-related deaths had been recorded statewide by Dec. 30 during the current flu season.