Brazil’s Health Minister Marcelo Queiroga announced the country would receive 1 million jabs of the Pfizer coronavirus vaccine on Thursday, as supplies of immunizations decrease and risk further delaying an already slow rollout.

Over the weekend, the health ministry said 30% fewer vaccines had been received between January and April than expected.

Minister Queiroga said the Covax facility, an international cooperation to help countries secure vaccines, had moved up the expected delivery of 2 million shots to May.