J&J's single-dose shot is less widely used in the United States compared to the 185 million doses delivered of Moderna and Pfizer/BioNTech's two-shot vaccines.
The CDC and FDA said the adverse events appeared to be extremely rare.
Fauci explained that the while the S. African variant can break through the vaccines, they are still effective at preventing serious illness and death.
The report from the European Medicines Agency is the first to mention a probe of blood clots associated with the J&J vaccine.
The government’s move to have the facility make only the J&J single-dose vaccine is meant to avoid future mix-ups.
J&J did not say how many vaccine doses the batch would have produced. The New York Times reported that about 15 million doses were ruined, without citing a source.
The officials gave no data on the disparities, but a health policy and research organization, found that POC are getting smaller shares of vaccinations as compared to their share of the population.
The US Food and Drug Administration announced the emergency use authorization of the J&J vaccine for adults aged 18 & older following Friday's unanimous endorsement by the agency's panel of experts.
Public health officials are increasingly counting on single-dose options like the one being tested by J&J to simplify and boost inoculations.