A beloved great-gran who caught Covid five days after getting her first jab has tragically died after coming agonisingly close to immunity.
Mary Green, 92, received the vaccine at her care home on New Year's Eve, Chronicle Live reports.
But the dose came too late to save her and just five days later she tested positive for the lethal virus, her family say.
Mary would likely not have developed protection against Covid so soon after the first injection as its efficacy does not take immediate effect.
She may have still been vulnerable to Covid even if she was exposed after the jab, although the exact date she contracted the virus is still unknown.
The news of Mary's positive test came as a devastating blow for son Chris Green, 52, knowing she had been so close to protection from the virus.
But his grief was compounded when his mum's condition deteriorated, and he was told she was too frail to undergo invasive hospital treatment.
Doctors told Chris the pensioner would find the hospital environment confusing as she suffered from dementia and advised she receive treatment in Charlton Court care home, Battle Hill, North Tyneside.
On January 17 she died of suspected sepsis that her doctor told Chris could have been caused by the coronavirus infection.
Chris says the tragedy has made him concerned that the pressures of the pandemic have led to elderly and more vulnerable patients being kept out of hospitals.
With warnings that the NHS is under huge strain due, and critical care beds filling up throughout the country, he questions whether doctors are being forced to make drastic choices.
Chris said: "My worry is that doctors are really under the cosh, I'm not criticising them because they are doing a fantastic job, but the last thing they need is a 92-year-old woman who might not pull through to add to that, but it's such a shame, because it feels like she didn't have a chance.
"She was a casualty of what we're going through at the moment with Covid. The care she needed in her final days wasn't in a care home setting, it was in a hospital setting, and she couldn't have that."
Chris also questioned how the deadly virus found its way into Charlton Court care home, in Battle Hill, where Mary lived.
He claims she and other residents tested positive in early January, as did a number of members of staff.
Another family member, who didn't wish to be named, added: "We did praise the home at first, because she had gone right through since March, they've only had a couple of cases, they had done really well.
"But then they have the vaccine and it's come in. She's either had it just before or it's happened just after she had the vaccine and it hasn't started work in.
"You do wonder if they've let their guard down once they've had the vaccine.
"We haven't been inside the home since March, we've only been able to see her from outside under a gazebo behind a screen."
With a family visit on January 2 cancelled due to lockdown, family say it was especially heartbreaking to lose Mary despite their careful precautions.
They say the tragedy shows the need for people to remain cautious even after the vaccine is administered.
A spokesperson for Charlton Court care home said: "There is nothing more important to us than the health and wellbeing of our residents. We send our sincere condolences to the family of Mrs Green.
"Our staff started to receive their Covid vaccinations from mid-December and we were delighted when our residents began to receive their Covid vaccinations later in December 2020 as part of the first roll out of the vaccination to homes in North Tyneside.
"Our staff team continue to adhere to strict Covid-19 preventative measures, including the use of PPE and regular testing in line with government guidelines, as they have done since the outbreak of the pandemic. We are grateful to our staff team who continue to care for all of our residents at this time."