Although Li Beiyao is an expert in traditional Chinese medicine, he has a lot of the same things in medicine, and he often listens to various medical lectures, so he knows a lot about Western medicine.

"I heard that Xibao accidentally fell downstairs and was sent to the hospital after losing too much blood, was it the blood transfused by the eldest brother, right?"

Su Manman nodded and said in surprise: "That's right, this ...... Any questions? ”

"Originally, there was no problem, but—"

Pursing his lips slightly, Li Beiyao twisted his eyebrows slightly, and then slowly spoke:

"It is generally believed that blood transfusions between close relatives are safer as long as the donor and recipient have the same blood type. But in fact, blood transfusions between close relatives are more dangerous than blood transfusions between non-relatives. This is because the first immunocompetent lymphocyte is present in the human blood, which can cause 'graft-versus-host disease'.

Immunocompetent lymphocytes present in human blood can recognize and reject immunocompetent lymphocytes in foreign blood and inactivate them.

However, when the recipient's immune function is low, the immunoactive lymphocytes of the blood donor will not only not be inactivated, but will survive and multiply in large quantities, and then attack the cells and tissues in the recipient's body, causing the recipient to have symptoms such as fever, rash, nausea, vomiting, anorexia, diarrhea, jaundice or blood in the stool, and can also cause pancytopenia and liver, kidney and other organ failure. ”

Li Beiyao's voice was neither high nor low, and it came into Su Manman's ears very clearly.

So, although Li Beiyao said a lot, she still grasped the key word - blood transfusion of close relatives.

Wait, what does this mean?

Could it be that Li Beiyao means that Li Beitian and Xibao are close relatives?

Her heart pounded, and a thought inexplicably jumped into her mind, which shocked Su Manman's heart, and she stared at the handsome face that Li Beitian had seen every day in the past few months.

Li Beitian and Xibao are close relatives?

That means they're ...... Parent-child relationship?

Boom –

How is this possible?!

Su Manman's mind was blank, and he lost the ability to think for a while, while Li Beiyao continued.

"Graft-versus-host disease, which often occurs within 1-4 weeks after blood transfusion, is extremely difficult to treat, with a case fatality rate of up to 99. Graft-versus-host disease can occur in normal transfusions, but most occur in grade 1 to 2, i.e., blood transfusions between parents and children.

Because the immunocompetent lymphocytes are very similar among the close relatives, in the case of the recipient's immunocompromise, the foreign immunoactive lymphocytes are more difficult to recognize and inactivate, and they will attack the cells and tissues of the recipient after they survive and multiply, resulting in graft-versus-host disease. ”

Li Beiyao's thick eyebrows frowned, lowered his head slightly, and the expression on his face was extremely solemn.

"And the symptoms you just mentioned are very similar to this graft-versus-host disease, and the time is relatively consistent, so I suspect ......"

He paused slightly, and looked up at Li Beitian: "Big brother, you are likely to be Xibao's biological father." ”

Boom –

Like a thunderbolt falling from the sky on a sunny day, both Li Beitian and Su Manman were stiffened in place.

It took four or five seconds for the two of them to come to their senses.

Su Manman was the first to react, and the picture of staying with a strange man all night suddenly appeared in her mind five years ago......

A few questions popped up in my head.

How could it be him?

But it seems that only he makes sense.