As Mick mentions in his comment, "to deem healthy" is just a little outdated-fashioned although not, I do think, enough that you shouldn't learn how to utilize the idiom. I would not call it "Victorian" English, as it is a phrase that sees regular use even now. 徘徊告警：也称逗留告警，当智能门锁检测到有人形生物在一定的距离内长时间逗留、徘徊，摄像头会自动抓拍/录像（指带电子猫眼的型号）... https://financialsettlementslawye62692.ampedpages.com/how-constitution-law-in-dha-karachi-pakistan-can-save-you-time-stress-and-money-63425488