Donation of blood should be deferred during the acute stage of a cold, and should wait for at least 1 week after the cold has cleared up. Colds are a type of acute upper respiratory tract infection. China’s “Health Examination Requirements for Blood Donors” stipulates that people who have not yet recovered from upper respiratory tract infections for at least 1 week should not donate blood for the time being. If there are obvious cold symptoms, such as fever, sore throat, cough, etc., you should suspend blood donation. If you feel mildly unwell and have been taking cold and flu medication prophylactically, it is also recommended that you do not participate in blood donation. In addition to acute upper respiratory tract infections, the rest of the temporary inability to donate blood also includes: tooth extraction within half a month or other minor surgery within three months, female menstruation and three days before and after, less than six months after miscarriage, childbirth and breastfeeding less than a year, acute gastroenteritis less than a week after healing, pneumonia less than three months after healing, and so on. It is recommended that patients with colds should donate blood at least one week after they have recovered, and read the health requirements in detail before donating blood, so as to be responsible for themselves and others.