A weak positive blood test for Mycoplasma pneumoniae should also determine what it means depending on the specific type. It usually indicates a previous infection, or a period of infection. 1. Previous infection: If the blood test for Mycoplasma pneumoniae is weakly positive, further examination should be conducted. If the IgG antibody is weakly positive and the IgM antibody is negative, it means that the body has been infected with Mycoplasma pneumoniae in the past, and has recovered from the disease through treatment or the body’s own immunity. 2. In the period of infection: If the IgG antibody and IgM antibody are both weakly positive, it suggests that Mycoplasma pneumoniae may be in the period of infection, if accompanied by fever, chest pain, cough and dyspnea, etc., it is necessary to further check and follow the doctor’s instructions to choose sensitive antibacterial drugs, combined with clinical symptoms of the symptoms of the symptomatic treatment. Weakly positive blood test for Mycoplasma pneumoniae should follow the doctor’s instructions for further examination and take appropriate treatment measures.