Do labs in morocco reuse Vacutainer holders and is it safe?

While im in vocation in morocco I noticed that in some laboratories in Morocco using the Vacutainer system to do blood work the plastic holder is reused between patients while the needle and tubes are changed im a bit worried and i would like to understand if there is any infection risk associated with reusing the holder cuz that can spreed disease go and see yourself Any medical professionals here who can clarify?