Why are we still alive when our bodies are constantly under attack from bacteria, viruses and more? As this video explains, it is because we have a coordinated army of cells fighting for our cause—and this is thanks to our immune systems.
Why are we still alive when our bodies are constantly under attack from bacteria, viruses and more? As this video explains, it is because we have a coordinated army of cells fighting for our cause—and this is thanks to our immune systems.