Dd2 tested positive on Tuesday. Shares nursery setting with DD3. Tested adults, DD1 and DD2 but not DD3 (she's 8 months old, couldn't face it). Have been treating DD3 as positive case. DD1 had negative PCR but today has tested positive on lateral flow. DD1 and adults been for repeat PCR today and all isolating. Do I need to test DD3 or can I just keep isolating her in line with whoever tested positive last? I just can't face swabbing her.