ACT's Health spokesperson says it's 'shady' that the Government hasn't divulged the storage costs of expiring RATs.

Health Minister Ayesha Verrall says Te Whatu Ora needs to 'get on with' finding options for the use of these leftover RAT tests- but no solution has been found.

ACT's Brooke van Velden says the Government either doesn't know the warehousing costs of all these tests- or they don't want to reveal the answer.

"Either she doesn't know- in which case that's shocking mismanagement, this is $160 million of taxpayer money and they don't know where it is and we should expect better- or they're not being transparent."

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