Former MP Harvey Proctor has said he is "relieved" after he was told Operation Midland is closing and he will face no further action over allegations which he consistently denied.
Mr Proctor's lawyer Nabeel Gatrad told ITV News the investigation has had "far reaching consequences", including leading him to lose his job and having to move abroad.
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A third of maternity workers who had previously been infected with the virus were completely asymptomatic.
Flood warnings and alerts are in place for Scotland and northern England, while high temperatures are set to continue further south.
The state recorded 331 new cases on Tuesday.