LONDON, May 22 (Reuters) - Two global health groups that fund billions of dollars worth of critical medical aid - from childhood vaccines to malaria treatments - are in talks about merging some functions to help combat a financing crunch, their chief executives told Reuters.

The groups – the Global Fund to Fight AIDS, Tuberculosis and Malaria and the vaccine group Gavi – said they had been discussing working more efficiently together for several years, but a massive pull-back on government-funded aid budgets, led by the Trump administration, has given the talks more urgency.

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