What diseases do the Spanish law require donors to study?

Under Law 14/2006, donors must be over the age of 18, have good psychophysical health and have the full capacity to act. 

Their psychophysical state must meet the requirements of a mandatory donor study protocol including their phenotypic and psychological characteristics as well as the clinical conditions and analytical determinations necessary to demonstrate, according to the state of scientific and technical knowledge existing at the time of their realization, donors do not suffer from genetic, hereditary or infectious diseases transmissible to offspring. 

The same conditions apply to donor samples from other countries; in this case, the persons in charge of the referral centre concerned must certify that all the conditions and all the tests, the determination of which cannot be made on the samples sent for acceptance, have been complied with. 

In any case, the approved centres may refuse the donation when the psychophysical state of the donor is not adequat.