Johnson & Johnson’s Janssen COVID-19 Vaccine: CDC and Food and drug administration have recommended a pause in the use of Johnson & Johnson’s Janssen COVID-19 Vaccine in the United States out of an abundance of warning, successful Tuesday, April thirteen. Folks who have received the J&J/Janssen COVID-19 vaccine within the earlier a few weeks who develop serious headache, belly ache, leg ache, or shortness of breath should seek medical care appropriate away.