The government has given YouGov 'guidance' to help make sure questions selected for the daily coronavirus briefing are appropriate.
The Mirror understands the questions are selected at random by pollster YouGov, who received some 15,000 questions on Monday, the first day of the new format.
But the pollster has been told questions must be questions must be related to coronavirus or the health, economic and societal impact of it.
And they must not be solely relevant to the person asking the question.
Questions will also be disqualified if they include profanity or racist language.
It's unclear whether the above criteria would rule out questions based on conspiracy theories such as 5G signals having caused the virus, or it being created deliberately.
Once a question is selected, the person who submitted it will be contacted by Cabinet Office officials who will ask them to prove their age and identity.
A government spokesperson said: "Coronavirus is the biggest health crisis the UK public has faced in a generation. We know people across the UK are making significant sacrifices every day in order to stay at home and protect the NHS, and we recognise the huge disruption this is having on their lives, jobs, and businesses."
They added: "It’s right that the public get the chance to put their questions on the virus and the measures we’ve put in place directly to the Government and the experts.
"Questions are chosen by an independent polling organisation. The government is not involved in choosing questions and all those appearing at the press conference are unaware of the question before it is asked."
