With blood stocks across the country are at a dangerous low, 702 Morning's listeners want to know why they can't donate.
With blood stock supplies in NSW at less than three days of coverage, the Australian Red Cross Blood Service appealed for more people to give blood over the weekend.
And what a weekend they had, the blood service received over 6000 calls for the day, and recruited 750 new donors.
But why are some people not permitted to give blood?
Listeners called in and texted the Mornings program with questions about their tattoos, medication or the time they had spent living in the UK?
The Blood Service spokesperson Shaun Inguanzo spoke to Linda Mottram to address listener confusion over who could and who couldn't give blood.
The greatest confusion stemmed from those who had spent time living in the UK between 1981 and 1996 for period of six months or longer.
ABC journalist Tiki Fullerton also rang in to ask why the same ban on blood donation did not apply to France?
"The prevalence of mad cow in France is much lower than the UK and a ban would not have impacted the risk," Shaun Inguanzo said.
People who lived in the UK during this period cannot even donate blood for research purposes.