More than 600 people recently vaccinated against COVID-19 in Connecticut must get the jab again because of improper storage of the shots. Had the Pfizer shots not been kept at such a cold temperature, close to 650 people who got the vaccine at the New Haven Health Department clinic between Dec. 23 and Feb. 7 would not now need to rush out for a do-over, The Hartford Courant reports. Improper storage risks rendering the shots less effective, something Pfizer warned city officials of, Health Director Maritza Bond, according to the paper. “After consulting with Pfizer and the Connecticut Departme…