Governor Greg Abbott will tour the University of Houston fentanyl vaccine lab on Thursday.

According to the University of Houston, a potential vaccine for fentanyl would be a breakthrough by blocking the dangerous synthetic opioid's ability to enter the brain and eliminating any "high" users receive.

Meantime, the DEA is issuing a public safety alert because of an alarming increase in fake fentanyl prescription pills. Of pills laced with fentanyl analyzed so far this year, six out of ten now contain a potentially lethal dose of fentanyl, according to the DEA. Last year it was four of out of ten pills analyzed at the DEA laboratory that contained a potentially lethal dose.

“More than half of the fentanyl-laced fake prescription pills being trafficked in communities across the country now contain a potentially deadly dose of fentanyl. This marks a dramatic increase – from four out of ten to six out of ten – in the number of pills that can kill,” said Administrator Anne Milgram in a news release.

“These pills are being mass-produced by the Sinaloa Cartel and the Jalisco Cartel in Mexico. Never take a pill that wasn’t prescribed directly to you. Never take a pill from a friend. Never take a pill bought on social media. Just one pill is dangerous and one pill can kill,” Milgram said.