Is it okay to remove the band-aid where an injection was made?

The bandaid is only there to absorb any blood that might result from the puncture. No problem.

Was the band-aid just covering the blood that the needle caused?

Correct.

No problem, unless she is still bleeding. If she still is, that is a big problem, because this many hours later the skin should be all healed up.

I usually take of bandaids after getting my blood taken or a shot within an hour.

The bandaid is just there to help the blood clot. Once it’s clotted and no longer an open wound, there’s no need for a bandaid.

You guys rock and roll.

To be honest the band aid is only there because people expect it.

The band aid is there to keep blood from getting on your clothes and stuff. Once it’s scabbed, usually within mere minutes, the band aid can come off.

I just had a tetanus shot; the nurse said to remove the band-aid after ten minutes.