Figures from the Red Cross reveal the number of people donating blood in the week after the data leak remained stable compared to the same period last year.

The data leak involved the personal details – including sexual and medical history – of 550,000 blood donors between 2010 and 2016 accidentally placed on a public section of the Red Cross website between early September and October 24.

A Red Cross spokesman confirmed the organisation received almost 2000 emails from donors about the data breach as well as 1700 calls to a dedicated hotline.

However, blood donors who spoke to The Canberra Times in the aftermath of the leak were not concerned about being at the centre of one of Australia's largest data breaches.

Neil Canavan has given blood 69 times over five years and first heard about the data leak through media reports before receiving a letter from the Red Cross.

He said he was amazed there hadn't been a data breach earlier.

"I'm surprised this data hadn't escaped before, the internet isn't secure," he said.

"I'm not too concerned, the information that they got was probably already publicly available like my email address."

Fellow blood donor Danuta Lancsar shared a similar view.

"No, I'm not concerned at all. It's not like they have my bank details. It's only tiny details like your email address and telephone number," she said.

Jeremy Neideck first started giving blood in 2011 as an incentive to gain points towards his Senior Secondary Certificate and continued in the years since.

He said while he never received any correspondence from the Red Cross alerting him to the online leak, the issue doesn't worry him.

"There aren't details that I would be concerned about leaking, but I can see why others would be concerned," he said.

In the wake of the data leak, the Red Cross has launched an investigation and promised to increase security of donors' personal details.

A spokesman said the Red Cross was doing "everything to regain public confidence" and that the results for the investigation were "looking positive" at this stage.

Affected donors have been warned about an increased risk to their online security and have been told to look out for phone or email scams.

Chair of the Australian Privacy Foundation Kat Lane said while the Red Cross has been handling the data breach well, the frequency of mass-data leaks has led to complacency among those affected.

"The big issue is that this happened in the first place, but what's becoming clear is that data breaches are occurring quite regularly now," she said.

"When the damage has been done, while everyone may not be worried about it, there may be others who find it very concerning and some that it has consequences for."