A number of vaccination centres and schools remain closed as snow continues to fall across Suffolk.
The Gainsborough Sports Centre in Ipswich, Trinity Park, Woodbridge Community Hall, Debenham Community Centre, The Mix in Stowmarket and Chevington Close in Bury St Edmunds all remain shut.
The EpiCentre in Haverhill is due to reopen for part of the day.
Anyone due to get a jab was being asked to rebook or wait to be contacted.
More than 200 schools, which have been open for children of key workers, remain closed to all pupils.
A Met Office yellow warning for snow was put in place across much of the region until 23:59 GMT on Wednesday.
Suffolk Police urged people only go out if necessary and to slow down if driving.
"Keep the roads as clear as possible for the essential workers and keep yourself safe," a spokesman said.
"If you go too fast and leave your car in a ditch, you are inconvenienced for the whole week, instead of the 40 seconds you will be late to your destination."
The Norfolk & Suffolk Roads and Armed Policing Team warned on Twitter that Swan Lane in Cretingham has been closed after a lorry collided with a hedge.
It said that any vehicle is "susceptible to the icy conditions" and asked people to "drive to the road conditions".
John Clements, head of operations at Suffolk Highways, said drifting snow meant there were "still some challenging areas", but farmers had been out clearing the roads.
Dan Holley, Weatherquest forecaster for the BBC, said: "We've had a band of snow coming in from the North Sea, that was associated with Storm Darcy, that gave anywhere up to 25cm [10in] of snow on Sunday.
"Since then we've just been dealing with this constant stream of snow flurries. They've turned a bit heavier for a time yesterday evening and gave an additional to three to six centimetres.
"Some places have over a foot of level snow on the ground in the county because the strong wings are causing drifts, so there's quite a bit of snow out there and it's still pretty blustery, but hopefully the winds will ease down today.
"We are going to see further snow showers coming in from the North Sea, a lot of them fairly light."
He added that it would remain cold until the weekend, and the snow would "take some time to shift... it is going to stick around into the weekend".
EAST: Another 10+cm fell over parts of Norfolk last night as frequent showers moved inland from the North Sea, with an area of snow also giving 3-7cm in parts of Essex and SE Suffolk to the south/east of the A12... ❄️— Dan Holley (@danholley_) February 9, 2021
Submit a snow depth report: https://t.co/yD9FJ8RUEL pic.twitter.com/xvB4HExdOz