Do an internet search for these phrases to see what I mean:

~ "Children Given COVID Vaccine Instead of Flu Shot at Walgreens Pharmacy"

~ "given Covid vaccine by mistake"

~ "Providers report dozens of errors giving Pfizer's COVID vaccine. Experts worry new boosters will fuel more"

~ "Dozens of Children Received Incorrect Dosage of COVID-19 Vaccine at Montgomery County School Clinic"

There are article for it happening here:

1. Montgomery County, Maryland,

2. Calvert County, Maryland,

3. Evansville, Indiana,

4. Louisville, Kentucky,

5. Antioch, California,

6. Manitoba, Canada,

7. Southhampton, UK .

And many more...