How sore is a wasp sting? is it as sore as a blood test or injection?

Less sore, : Initially and much more later. Wasp sting is likely to cause swelling and pain for a few days, whereas blood test or injection is a temporary state, lasting a few minutes.

Wasp sting is more: painful usually. However - amt of pain depends of type of wasp (for instance hornets & yellow jackets are both waps). Hornet stings are usually more painful than other wasps because their venom contains 5% acetylcholine. Some hornet species have extremely toxic venom. The Asian Giant hornet has the most dangerous venom & is responsible for many deaths every year. Yellow jackets can sting & bite!