The phrase "almost immediate impact" is correct and usable in written English.
It can be used to describe an effect or result that occurs very soon after an action or event, but not instantaneously.
Example: "The new policy had an almost immediate impact on employee productivity, leading to noticeable improvements within the first week."
Alternatives: "rapid effect" or "quick influence".
But the introduction of Hernandez for Efrain Juarez soon after had an almost immediate impact.
Early evaluations show that these teachers stay in the profession longer and have an almost immediate impact on student achievement.
School levies, minimum wages, city council elections – these votes have a real and almost immediate impact on your life and the lives of your community.
But the substitute Pereira had an almost immediate impact, carrying the ball half the length of the pitch from inside his own penalty area before feeding Osborn down the left.
Excising the repeal provision had almost immediate impact on the stalled National Defense Authorization Act, the formal name of the larger bill that provides pay increases and enhanced benefits for members of the armed forces.
His replacement Dante, from Bayern Munich, made an almost immediate impact just before half-time.
Most ERP software roll-outs have been relatively smooth, and the companies involved have reported an almost immediate positive impact on their business.
Almost an immediate impact from Stoke's substitutes.
Why is there no evidence at the creek for the almost immediate post-impact destruction, as assumed by the standard theory?
Dyche shuffled his pack on the hour mark by introducing Treacy and it almost brought about an immediate impact but the Irishman could only direct his header at Camp.
He was substituted with six minutes to go for another debutant, Ayoze Pérez, and the 21-year-old Spaniard almost made an immediate impact, running into the penalty area before taking aim.
