The vaccine has an efficacy of 66% worldwide Author: Jade Cunningham / WWL Eyewitness News Published: 6:02 PM CST January 29, 2021 Updated: 6:06 PM CST January 29, 2021 NEW ORLEANS — It's possible a third COVID-19 vaccine could be approved soon. Johnson & Johnson released the findings from their trial Friday and are expected to request emergency approval by the FDA in about a week. Requiring only one dose and regular refrigeration, Johnson & Johnson's COVID-19 vaccine is being called a "gamechanger." "The fact that we have another vaccine that looks very good, that is only a single dose, is going to help immunize a lot more people a lot faster," said Tulane Microbiologist, Lisa Morici, PhD.