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Foreign Secretary David Lammy has criticised Israeli authorities after two Labour MPs were denied entry to the country, describing the move as "unacceptable, counterproductive, and deeply concerning".

“The reality is that vaccine safety — like all areas of medicine — benefits from rigorous, open research, and suppressing inquiry would be counterproductive.”

"It would be counterproductive, it wouldn't save them money," she says, because her other benefits would rise if she lost her earnings.

BBC Verify has examined the past 15 years of policies in this area to see what might be effective – and what risks being counterproductive.

The South African government has said it will not take part in "counterproductive megaphone diplomacy" following a fresh social media post by US President Donald Trump repeating his claim that Pretoria was confiscating land.