An influential U.S. federal advisory panel is set to meet Friday to potentially decide the fate of the Johnson & Johnson coronavirus vaccine rollout, as more reports emerged of rare but severe blood clots in women who received the shot. Health officials in Oregon said Thursday that the Centers for Disease Control and Prevention was investigating the case of a woman who died after developing a blood clot two weeks after immunization. In Texas, authorities reported that a woman was hospitalized with possible blood clots associated with the vaccine, the Associated Press reported.

The meeting of the CDC’s Advisory Committee on Immunization Practices comes after several European nations and South Africa either resumed the shot’s use or began distributing doses, following a finding by Europe’s drug regulator that the vaccine’s benefits outweighed the possible risks.