blood donation

Dear scholars, as-Salamu `alaykum. Sometimes the people who donate blood ask for large sums of money in return for their donation. Are they entitled to do so? In other words, is it permissible to take compensation for blood donation? Also, what is the evidence on the permissibility of blood donation? Jazakum Allah khayran.

Dear scholars, As-Salamu `alaykum. Can a person donate blood while fasting? Jazakum Allah khayran.

Dear scholars, As-Salamu `alaykum. Is blood transfusion allowed in Islam? Why or why not? Jazakum Allah khayran.

Dear scholars, as-Salamu `alaykum. How does Islam view blood donations? If I live in a non-Muslim country, do I receive a reward for donating blood to the community I live in at large, regardless of the religion of the one who receives my blood? Jazakum Allah khayran.

Dear scholars, As-salamu `alaykum. Is it permissible to donate blood to patients? Jazakum Allah khayran.