Cough, Feeling of not being able to get enough air, Rapid heart rate (pulse) Feeling of not being able to get enough air, Pain or discomfort, Palpitations (fluttering in chest), Rapid heart rate (pulse) Palpitations (fluttering in chest), Pounding heart (pulse), Rapid heart rate (pulse), Shortness of breath.
The four main blood types are A, B, O and AB. They differ from each other by which antigens are present on the blood cells. They also have subgroups for each main types. So A has the sub group of AA or AO. Then there is the Rh or Rhesus blood type. Humans are usually +ive or -ive. With a number of antigens for this.
Among the 8 types, O+ is the most common blood type. Nearly 35-40% people all over the world have O+ blood type. The second most common type is the A+ with 30-32% people belonging to it all over the world. As O+ is a common blood type, people belonging to this group have no problems in receiving as well as donating blood.