CTV is rpeoritng that "A 75-year-old man is among multiple people in Ontario who say they were accidentally given the equivalent of six doses of the COVID-19 vaccine while getting their booster shot. CTV News Toronto has spoken with multiple people who received their booster shot at the Schomberg Medical Clinic near Newmarket on Jan. 8 and were affected by the vaccine mix-up."
"A 28-year-old woman and her husband, who asked not be identified, are among those who were notified about the dosage error a few hours after they got their shot. She said they were told by the receptionist that the doctor didn’t dilute the Pfizer COVID-19 vaccine, meaning they had received six times the proper dose."
"According to health officials, each Pfizer COVID-19 vial contains 0.25 mL of product, which saline is added to and is enough vaccine for six doses. In this case, the vaccine was not diluted and people were given the full vial."
(We don't need more testing of asymptomatic people.)
Telling the clinics they're supposed to dilute the doses is kind of an important detail to remember. If they had half a brain they'd be dangerous. Well, they are dangerous even with half a brain.