Harker blinked back tears, and cleared his throat. "Um… Doctor, can I ask you another favor?"
Dr. Rothstein blinked under the thick lens of his glasses that made his eyes look comically large. "What is it?"
"Well, can you perform a short blood transfusion between me and the mermaid? I want to donate some of my blood to her. Just 100 milliliters would do." Harker asked.
The doctor was even more confused. "I could but…. What are your blood types?"
Harker's eyes widened. He just remembered about the blood types. That's really important, as the body would reject a donor's blood if the blood type was incompatible. It can cause severe damage to the immune system.
"Well…. Fishes have different blood types from humans. But Princess Jinzhu was not a full fish either. So mermaids may have a completely different set of blood groups…." Harker thought about it. "This is really more complicated than what Yan led me to believe."
"Who?" The doctor asked.
