Pfizer and Moderna have announced the production of vaccines that are more than 90 percent effective in preventing COVID-19, countering media reports and experts who said President Donald Trump would need a "miracle" to keep his promise of the United States having a coronavirus vaccine by the end of 2020. They Said It Would Take a ‘Miracle’ to Have a Vaccine By the End of 2020
Pfizer and Moderna have announced the production of vaccines that are more than 90 percent effective in preventing COVID-19, countering media reports and experts who said President Donald Trump would need a "miracle" to keep his promise of the United States having a coronavirus vaccine by the end of 2020. 
