Katherine Kallinis Berman

Abstract Background: In the earliest days of COVID-19 pandemic, the collection of dried blood spots (DBS) enabled public health laboratories to undertake population-scale seroprevalence studies to estimate rates of SARS-CoV-2 exposure. With SARS-CoV-2 seropositivity levels now estimated to exceed 94% in the United States, attention has turned to using DBS to assess functional (neutralizing) antibodies within cohorts of interest.

Preparation For the cupcakes, preheat the oven to 350 ˚F. Line a standard muffin pan with 12 baking cups, and a second pan with 3 baking cups. Sift together flour, baking soda and salt in a bowl. Combine vanilla extract and milk in a large liquid measuring cup. In the bowl of a standing mixer, beat butter on medium speed until fluffy. Add sugar and beat on medium speed until combined. Add eggs, one at a time and mixing slowly after each addition.

Topped with rich cream cheese frosting and a drizzle of vanilla caramel sauce, these fluffy apple treats are a fall must-have. Ingredients Makes 18 cupcakes For the cupcakes: 2 1/2 cups all-purpose flour 3 tsp. baking powder 1 tsp. ground cinnamon 1/2 tsp. salt 16 Tbsp.