Most colds and fevers are viral colds that do not require fluids, but fluids do not have any killing power for viruses. Ninety percent of colds are viral, so fluids are not very useful, and a proper fever can strengthen one’s immune system and speed up blood circulation to fight the virus. Generally, the common viral cold can heal itself in about a week. Too many fluids are not only unhelpful but also harmful to the body. So viral fever infusion is not useful, it is better to drink more water and rest to improve their immunity.