Mr Henry revealed he had been in contact with someone with the virus on Friday last week (December 10), while in Parliament in London.
He has since had a positive test himself and is now hoping that his close contacts will also get tested as a precaution after he paid a visit to the Bird Hide micropub in Attenborough over the weekend.
In a Twitter thread yesterday Mr Henry said: "This afternoon I had a positive Covid-19 self-test lateral flow test.
"The background is that I was informed yesterday that I had been in contact with someone in Parliament on Friday who had a positive Covid test on Sunday.
"I had a negative LFT on Sunday as soon as I had heard. However a further LFT I took today was indeed positive.
"I had a PCR test at 11am today also and at present I am waiting up to 72 hours for the result.
"I am letting people know my result who might be at risk including the owner of a micro pub I visited in Attenborough on Saturday, Chris Harkin, at the Bird Hide.
"My big disappointment therefore is that I was extremely keen to be at the vote tomorrow but cannot travel from Broxtowe to Parliament until the results of my PCR test are clear. In line with Government guidance, I am isolating to keep others safe.
"I would strongly encourage my Parliamentary colleagues to vote against the measure to bring in vaccine passports as I had intended to do if I could be in Parliament to vote.
"Unfortunately, there are no mechanisms for an MP to vote by proxy due to having to self-isolate and the pairing arrangements used when MPs are absent effectively record non-voting as an abstention.
"If I was able to attend the vote tomorrow I would be voting against the introduction of vaccine passports."