Derrick Johnson had a makeshift mask. He had the spray bottle of bleach and extra soap that corrections officers provided. But he still spent every day crammed in a unit with 63 other men in a Florida prison, crowding into hallways on their way to meals and sleeping feet from one another at night.

As the coronavirus ravaged the Everglades Correctional Institution, Johnson was surrounded by the sounds of coughing and requests for Tylenol. And while he thought a lot of the prison’s policies were ineffective at protecting prisoners, he also wondered if that was the best the facility could do.

“Prison is not built to compete with a pandemic,” said Johnson, who was released in December. “The pandemic’s gonna win every time.”

For 15 months, The Marshall Project and The Associated Press tracked the spread of COVID-19 through prisons nationwide. We counted more than a half-million people living and working in prisons who got sick from the coronavirus. Prisons were forced to adapt to unusual and deadly circumstances. But now, as new cases are declining and facilities are loosening restrictions, there’s little evidence to suggest enough substantive changes have been made to handle future waves of infection.

With crowded conditions, notoriously substandard medical care and constantly shifting populations, prisons were ill-equipped to handle the highly contagious virus, which killed nearly 3,000 prisoners and staff.

Corrections systems responded with inconsistent policies, struggling to contain the virus amid understaffing and overcrowding. At its peak in mid-December, more than 25,000 prisoners tested positive in a single week.

But in recent months, infections behind bars nationwide have slowed to a few hundred new cases each week, and many prisons have eased what restrictions they had in place, including mask-wearing, visitors and other movement in and out, going back to business as usual.

It’s a critical moment, with new coronavirus cases low but the threat of infection looming as new variants spread around the world, said Dr. David Sears, an infectious-disease specialist and correctional health consultant.

“The medical community, prison leadership, and society at large have learned so much about COVID in a short period of time,” Sears said. “We need to take these lessons and make sure that the things we’ve learned after a lot of real human suffering are not in vain.”

Read the full article about COVID-19 cases in prisons by Katie Park, Keri Blakinger, and Claudia Lauer at The Marshall Project.