KSQD 4-27-2022: The role of T-cells in the action of COVID-19 booster vaccines; Vitamin K does not cause blood clots and the different roles of vitamin K1 vs. K2; Paxlovid and EVUSHELD are antibody treatments for COVID-19 that attack the spike protein; CRISPR experiment proves a gene mutation leading to Lupus; Coronary arterial plaque, the calcium CT scan to measure it and preventative measures; AI interpretation of CT images finds pancreatic cancer better than humans alone; Oral squamous cell carcinoma is diagnosed by dentists, but one third of Americans don’t see a dentist regularly; Comparisons of diets for their effects on reducing cancer progression -- probiotics also help; Somatic mutation rates in mammals define the expected lifetimes of mammalian species