![J&J 1-Dose Shot Prevents COVID-19, but Less Than Some Others](http://townsquare.media/site/757/files/2020/11/RS39277_RS22387_GettyImages-1027752634-scr.jpg?w=980&q=75)
J&J 1-Dose Shot Prevents COVID-19, but Less Than Some Others
Johnson & Johnson says its vaccine appears to protect against COVID-19 with just one shot. It's not as strong as some two-shot rivals but still potentially helpful for a world in dire need of more doses.
![Wake Up Wyoming logo](http://townsquare.media/wp-content/uploads/2019/08/glennwoodsshow.png?w=100)
Enter your number to get our free mobile app
Results released Friday show the single-shot vaccine was 66% effective overall at preventing moderate to severe illness, and much more protective against the most serious symptoms.
The vaccine worked better in the U.S. compared to South Africa, where it was up against a tougher, mutated virus.
The company says it will file an application for emergency use soon in the U.S., and then abroad.
More From Wake Up Wyoming
![Cheyenne Regional Dropping Mask Requirement](http://townsquare.media/site/99/files/2023/03/attachment-Untitled-design-2023-03-07T160308.374.jpg?w=980&q=75)
![ACT test scores drop to lowest in 30 years in pandemic slide](http://townsquare.media/site/101/files/2022/10/attachment-sam-balye-w1FwDvIreZU-unsplash.jpg?w=980&q=75)
![Wyoming Ranked as One of the Worst States for Vaccination Rates](http://townsquare.media/site/147/files/2022/09/attachment-Vaccination-Rate-WYO.jpg?w=980&q=75)
![Wyoming Reports 5 More COVID-19 Deaths](http://townsquare.media/site/99/files/2022/06/attachment-RS28263_ThinkstockPhotos-587937406-scr.jpg?w=980&q=75)
![Wyoming Reports 5 More COVID-19 Deaths, Highest Total in 8 Weeks](http://townsquare.media/site/99/files/2022/03/attachment-RS4080_160103034.jpg?w=980&q=75)
![Fauci Tests Positive for Virus, Has Mild COVID-19 Symptoms](http://townsquare.media/site/101/files/2021/12/attachment-GettyImages-1356634193.jpg?w=980&q=75)
![Wyoming Reports Zero COVID-19 Deaths for the First Time in 2022](http://townsquare.media/site/757/files/2020/03/fusion-medical-animation-EAgGqOiDDMg-unsplash.jpg?w=980&q=75)
![Liz Cheney Tests Positive For COVID-19](http://townsquare.media/site/101/files/2021/11/attachment-GettyImages-1233614061.jpg?w=980&q=75)
![Wyoming Reports Three More COVID Deaths, Two From Laramie County](http://townsquare.media/site/99/files/2022/03/attachment-RS4080_160103034.jpg?w=980&q=75)