A nurse was caught on video injecting a young woman with air rather than a Covid vaccine at a vaccination center in Morelia, Michoacán, on Tuesday.

The incident, which was reported to authorities after the video began to circulate on social media, occurred on Morelia’s second day of vaccination for the 18 to 28 age group.

State officials confirmed in a press release that there had been a case “in which an inadequate application of the vaccine occurred,” and added that it was “without a doubt an error that we cannot overlook. The necessary measures will be taken to strength control of the vaccination process and insure it does not happen again.”

The council also pointed out that healthcare workers have been “subject to intense work days, stress, and even putting their lives at risk.”

It is not the first mishap in the vaccination process. Various misapplied shots have been caught on camera, including one in Mexico City that President López Obrador suggested was a media set-up.

In recent days, Morelia vaccination centers have seen long lines as youths and parents arrive up to 15 hours ahead of time with folding chairs and tents, eager to secure their shot.

Mexico had administered 78 million doses as of Tuesday.

With reports from El Universal