Most severe cases will have dyspnea and hypoxemia after one week, and will soon enter acute respiratory distress syndrome, septic shock, or metabolic acidosis and coagulation dysfunction that are difficult to correct. Sometimes it can also affect the central nervous system, and ischemic necrosis of limbs will occur, leading to death.
Therefore, the state attaches great importance to the policy of giving priority to prevention, or more prevention and less gathering.