My ro-bio needle works on NPCs but Not on Players?

I'm trying to make a ro-bio CHAOS game where you can inject other players, the needle works on NPC'S but it just goes right through another player, here's the script in the needle item.

tool = script.Parent


function tween(part,poartpp,spded)
    local tweenService = game:GetService("TweenService")


local tweeningInformation = TweenInfo.new(

spded, -- Length
Enum.EasingStyle.Elastic, -- Easing style of the TweenInfo
Enum.EasingDirection.Out, -- Easing direction of the TweenInfo
0, -- Number of times the tween will repeat 
false, -- Should the tween repeat?
0.1 -- Delay between each tween 
)


local Tween = tweenService:Create(part,tweeningInformation,poartpp)
Tween:Play()
end





local RunService = game:GetService('RunService')





















local both = script.Parent.Needle

local needle = both.metal
weld = needle.Weld

usable = true
can = true


both.bio.Virus.Changed:connect(function()
    if both.bio.Virus.Value ~= nil then
        if both.bio.Virus.Value.Name == "Biologic" then
            both.bio.BrickColor = BrickColor.Random()
        else
            both.bio.BrickColor = game.Lighting:FindFirstChild(both.bio.Virus.Value.Name .."C").Value
        end

    else
        both.bio.BrickColor = BrickColor.new("Medium stone grey")
    end
end)


tool.Activated:connect(function()
    if usable then
    if can then
    can = false
    needle.Sound:Play()
    tween(weld,{C1 =weld.C1 * CFrame.new(2,0,0.2)},0.5)
    wait(0.7)
        tween(weld,{C1 =weld.C1 * CFrame.new(-2,0,-0.2)},0.5)
        wait(1)

        can = true

    end
    end
end)







both.Hit.Touched:connect(function(hit)
    if usable then
if can == false then if hit.Parent:FindFirstChild("Humanoid") then if hit.Name ~= "HumanoidRootPart" and hit.Anchored == false  then    
    if not game.Players:FindFirstChild(hit.Parent.Name) then
    local huma = hit.Parent:FindFirstChild("Humanoid")
    if (both.bio.Position - hit.Position).Magnitude < 1 then
usable = false
    hit.Parent.Humanoid:TakeDamage(6)
        local tos = needle.CFrame:toObjectSpace(hit.CFrame)
    local new = both:Clone()
    new.metal.Weld:Remove()
    new.Parent = hit
local we = Instance.new("Weld",new.metal)
    we.Part0 = new.metal
    we.Part1 = hit
we.C1 = tos:inverse()

    new.metal.CanCollide = true
        new.bio.CanCollide = true
    needle.Transparency = 1
    both.bio.Transparency = 1


        local sond = Instance.new("Sound",hit)
    sond.SoundId = "rbxassetid://1306077413"
    sond:Play()
    sond.PlaybackSpeed = 2
    sond.Volume = 2
    wait()
        local sond = Instance.new("Sound",hit)
    sond.SoundId = "rbxassetid://1751518775"
    sond:Play()
    sond.PlaybackSpeed = math.random(6,10)*0.1
    sond.Volume = 1
    if new.bio.Virus.Value ~= nil then
    local virus =  new.bio.Virus.Value:Clone()

virus.Parent = hit.Parent   
virus.Name = "Biologic"
    end

    wait(3)
    both.bio.Virus.Value = nil
    usable = true
        needle.Transparency = 0
    both.bio.Transparency = 0.5
    end
end
end
end
end
    end
end)

and it really DOES work on NPCS i have no idea why doesn't it on Players.