Both the buildings were immediately evacuated and the employees working in the area close to where the incident took place have been isolated and will undergo an evaluation by the Fire Department, Hoppe further said. "The bacteria that cause tuberculosis are spread from one person to another through tiny droplets released into the air via coughs and sneezes", according to the Mayo Clinic.
But authorities later confirmed "that there was no risk to anyone on campus", Hoppe said.
A statement from Hopkins says the buildings were evacuated Thursday as a "cautionary measure".
"There was a small tube that contained a frozen sample, and it was dropped and the lid came off while the sample was still frozen inside", Dr. Landon King, executive vice dean of the Johns Hopkins School of Medicine, told the outlet.
A statement from the hospital said the bacteria, used primarily for medical research, may have been inadvertently released while in transit.
Officials from the Baltimore City Department of Health also are reportedly on the scene.
The two buildings remained off limits for several hours, and were reopened after public safety officials and infectious disease experts gave the all-clear, according to the report. The bacteria affect the lungs, which can lead to chest pain, fatigue, fever, prolonged coughing or coughing up blood, night sweats, and loss of appetite. In the year 2016, only nine thousand two hundred seventy-two cases of TB were reported, which is regarded to be the lowest count recorded till today.
He added that the people who were on or near the site of exposure do not need additional testing.
Tuberculosis, also known as TB, is a risky airborne disease which spreads easily via air. That same year, 9.272 cases were reported in the United States, and provisional data from 2017 found 9,093 cases. It can be fatal if it goes untreated.