True or False: In times of dire need, no more than three units of blood may be taken from a single donor.

The statement is false because, under standard medical practice, a single donation of whole blood typically provides one unit, which is about one pint. It is possible for a donor to give multiple units, such as with apheresis, where specific blood components are collected, but in standard blood donation practices, no more than one unit is drawn at a time for safety reasons. Moreover, safety protocols and guidelines for blood donation usually specify a waiting period before a donor can donate again, which emphasizes the importance of maintaining the donor's health and well-being.

In emergencies, while there may be protocols in place to expedite the use of blood, the fundamental practice regarding the safety limits on how much blood can be taken from a single donor remains the same. Hence, the correct answer reflects that the statement does not align with standard medical practices regarding blood donation.