Single check mark â this means your message was successfully delivered to the WhatsApp server. Double check mark â this means your message was successfully delivered to the phone of your chat partner. WhatsApp does not indicate that the message you sent was read; just that it was delivered.
There are more than 400 types of anemia. These types of anemia are divided into three main groups, according to their cause. There is anemia caused by blood loss, by decreased or faulty red blood cell production, and by destruction of red blood cells.
The most common type is iron deficiency anemia, which is caused by a lack of iron in your body. Other types include: 1  Vitamin deficiency anemia, megaloblastic anemia, caused by a lack of folic acid and vitamin B12 in your body.hey contain hemoglobin, an iron-based protein that helps blood cells carry oxygen. With anemia, your body either does not make enough red blood cells, or loses them faster than they can be replaced. There are several types of anemia.