By Jennifer Rigby, Olivia Kumwenda-Mtambo and Maggie Fick LONDON (Reuters) - Health and humanitarian groups around the world were still uncertain on Wednesday if and how they could resume work after the United States issued a waiver for "life-saving" assistance in President Donald Trump's freeze on U.

US Secretary of State Marco Rubio has backpedalled on the near-total freeze of US foreign aid, stating that ‘life-saving humanitarian assistance’ would be continued during the 90-day review period. There is widespread uncertainty about which programmes fall under the new waiver among global and South African health organisations.

The move comes after the order sparked widespread criticism and confusion. A federal district judge had temporarily paused the freeze.

The White House budget office Wednesday rescinded the federal aid freeze, according to multiple media reports citing an administration memo.

The White House Office of Management and Budget has rescinded the federal aid freeze, according to a memo obtained by CNN from a Trump administration official.