CDC advisory panel debates next steps in Johnson & Johnson vaccinations, makes no decision yet Johnson & Johnson and last updated 2021-04-14 17:36:57-04 A CDC advisory panel debated possible next steps in the administration of the Johnson & Johnson COVID-19 vaccine, and after hours of questions and presentation, decided Wednesday they did not have enough information about the rare instances of blood clots to make a recommendation. The Advisory Committee on Immunization Practices held an emergency meeting Wednesday afternoon to review what is known about the six reported cases of blood clots out of the 7 million vaccinations of the Johnson & Johnson COVID-19 vaccine.