A new strain of the coronavirus found in the United Kingdom has gained the attention of health officials here in the United States. The new strain means lots of new questions. Arguably the biggest is: will the Pfizer and Moderna vaccines be effective against it? Dr. Costi Sifri, an infectious disease expert with UVA Health, says it may be. “From a scientific standpoint, the ability to have those platforms to essentially plug-and-play with new emerging pathogens is quite exciting,” he said.