The MRNA code instructed the now reprogrammed DNA inside the cells to order the cells to start producing spike proteins. DNA is an instruction set of code written in chemistry. The MRNA injection is like a patching of that code, just like we patch computer code. Now their immune systems are likely seeing those spike proteins and reacting as if they have a viral infection. That looks like cold and flu symptoms to a medical observer, because that is how the immune system responds to a cold and flue infection. The spike proteins are also causing the blood clots, throughout the body. It is possible some people may have immune systems that can detect and destroy the cells with the reprogrammed DNA. DNA does have self repair systems designed to remove bad or damaged code. DNA has error correction protocols. Radiation damage to DNA strings, for example, can be healed by the body if the damage is not too great. Literally, DNA can be copied, cut and pasted to replace bad code with good code. The vaccine damage done to these particular people may be reversible in some cases. Hence the need for multiple vaccine doses to finish them off.