'Data base and health records'published at 12:01 British Summer Time 2 April 2020
The committee's Deputy Chair, Pam Cameron, also joins the meeting by audio link.
She asks the minister about the letters sent to those who have been identified as vulnerable, and who have been advised to stay at home for 12-14 weeks.
Mr Swann says the letters were sent out based on "database and health records".
He says in relation to the timeframe of "shielding" for those who have received letters, "that's where the modelling will start to play out".
"The longer we see it run and see what happens," he adds, then there will be scope to see "if we can take foot off some of the measures" currently in place.