Here’s a look at health and environmental news from around South Carolina.

DHEC offers free flu shots at three locations Friday

COLUMBIA, S.C. (WACH) — The South Carolina Department of Health and Environmental Control has set up three walk-in clinics for South Carolinians in the Upstate, Midlands and Low Country.

Free flu shots clinics will be held in Greenville, Lexington and North Charleston on Friday.

Residents urged to dispose of unused medicine

The S.C. Department of Health and Environmental Control is encouraging residents to drop off unused, expired or unwanted prescription drugs at participating locations around the state during National Prescription Drug Take Back Day.

General interest

Doctors have a No. 1 suspect for paralyzing illness

The Centers for Disease Control and Prevention says it doesn’t know what’s causing a sudden rise in cases of a frightening, polio-like condition that leaves children paralyzed or with weakened limbs.

The No. 1 suspect had been a virus called enterovirus D68, or EV-D68. In 2014, a wave of cases of acute flaccid myelitis coincided with outbreaks of EV-D68 across the country.

But the CDC says it has not consistently found EV-D68 in confirmed cases since then. Officials say they’re looking at a range of possible causes.