First of all, the blood drawn by the health certificate is too little, as long as it is used to rule out several diseases. Secondly, it is not a special blood collection sheet, so there is no way to carry out other treatment.
Friends who have donated blood know that generally 200 to 400 ml of blood should be donated, and it should be preserved with special blood collection belts and special equipment. Only in this way can it be convenient for post-processing and rational use.