An estimated 4,300 Californians got the wrong dose of Pfizer's COVID-19 vaccine on Monday, whistleblowers have revealed. The correct dose of Pfizer vaccine is 0.3 mL - so the Monday morning patients probably got about two-thirds of that, or 0.2mL. Low dead space syringes like this one allow six 0.3 mL doses of Pfizer vaccine to be extracted from its vials. But that was only reliably possible with low dead space syringes. Only about 40 million of the 286 million syringes that major supplier Becton Dickinson was producing for the US vaccine kits in January were low dead space syringes.

Source: The Nation March 04, 2021 00:56 UTC