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There's been an outpouring from people wanting to donate blood following the mass shooting in Orlando, with hundreds of people lining up down the block outside the local blood bank.

Oneblood spokesman Pat Michaels told Fox News the response has been "overwhelming" and likened it to the number of donors that came out after the 9/11 attacks.

He said that even after people were told that the center had the supplies they needed, apart for some specific bloodtypes and plasma, they wouldn't be turned away.

"The people who are here are here to roll up their sleeves, and they're willing to do something ... There's not much we can do to turn them away."

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