Wiltshire’s Police and Crime Commissioner Angus Macpherson has confirmed that Sgt Nick Bailey has now returned to work.
Sgt Bailey was contaminated with Novichok as he tried to help Sergei and Yulia Skripal in Salisbury.
Mr Macpherson said: “I’m not worried about him now as much as I was. He’s making a good recovery... I suspect the mental recovery will be longer, as it would for any of us who were exposed to something as horrific as that.
"But he’s doing very well and we look forward to working with him. He will be given all the support he needs.”
Speaking to the BBC in November, Det Sgt Bailey described being "petrified" when doctors broke the news to him he had been poisoned with Novichok.
He and two colleagues were sent to the Skripals' home, after the former Russian spy and his daughter were found seriously ill on a bench in Salisbury on the afternoon of Sunday 4 March.