The length of treatment varies according to the patient’s specific disease condition, individual constitution and other factors, so it cannot be clearly given how many injections of BCG Polysaccharide Ribonucleic Acid Injection can improve immunity. BCG polysaccharide ribonucleic acid injection is a kind of drugs that can improve the patient’s body resistance to disease while also asthma, anti-allergic drugs, usually three months for a course of treatment, need to be injected 2 to 3 times a week, according to the patient’s specific disease condition, personal constitution and other factors are different, the patient’s specific need to be injected with BCG polysaccharide ribonucleic acid the number of courses and length of time required is also different, and the onset of action time also exists differences. Therefore, it can not be clearly given how many injections of BCG polysaccharide ribonucleic acid injection can improve immunity, generally need at least one course of treatment, BCG polysaccharide ribonucleic acid injection can be used to treat or prevent chronic bronchitis, asthma and colds and other diseases. BCG polysaccharide ribonucleic acid injection need to be used under the guidance of a physician, it is recommended that patients who need to use BCG polysaccharide ribonucleic acid injection treatment to the relevant departments of the regular hospital for detailed consultation.