Blood counts usually return to normal in about 1 week after an upper respiratory tract infection. Upper respiratory tract infections have a relatively short course and usually resolve in 7 days. Most are caused by viral infections, while a few can be caused by bacterial infections or secondary to viral infections. In viral infections, the white blood cell count is usually normal or low, and the proportion of lymphocytes is relatively high, which can be normalized in about 7 days by resting and drinking plenty of water. If white blood cells are elevated and C-reactive protein is elevated, consider the presence of bacterial infection, give anti-infection treatment (such as cefixime, azithromycin, etc.), usually 7 to 10 days can be cured. The blood routine can return to normal. Drink more water, eat more fresh vegetables and fruits, do not eat spicy stimulating food. Pay attention to keep warm, prevent cold, improve immunity. If you suffer from upper respiratory tract infections, it is recommended to carry out standardized treatment under the guidance of a doctor as soon as possible to promote the early recovery of the disease. The above drugs should be used under the guidance of a doctor.