Professor Ron Milo’s team at the Weizmann Institute of Science in Israel analyzed the results of immune cell research published so far through Google Scholar and Public Med searches, and found that the human immune system consists of approximately 30 trillion cells out of the total number of cells. It is composed of approximately 1.8 trillion cells (based on an adult male weighing 73 kg), and the total weight is estimated to be approximately 1.2 kg, according to the Proceedings of the National Academy of Sciences (PNAS). For women, it is 1.1 trillion per 60 kg of body weight, and for children, it is per 10 kg of body weight.
Professor Milo’s team is a notable research team that publishes research that quantitatively analyzes cells in the human body.
As an estimate, in 2016, the number of cells in the human body was 30 trillion and the number of bacteria was 38 trillion, and in 2021, the results of cell turnover analysis were announced that our body replaces an average of about 330 billion cells per day. there is.
Based on Professor Millo’s team’s cell estimates, the number of immune cells corresponds to 6% of the total number of cells, and the mass corresponds to approximately 2% of the total. 1.2kg is roughly similar to the weight of one pineapple. The study of immune cells is the result of their third cell quantification effort.