There had been some buzz before the piece appeared on the Banksy website http://www.banksy.co.uk on 10 December around 17h. A few hours later it was published on the official instagram account, @banksy.
The Guardian commented the artwork a few hours later:
The owners of a house in Bristol have apparently pulled out of the sale of the property after a Banksy piece appeared on the wall. On Thursday, the anonymous street artist confirmed he was behind the artwork showing an older woman sneezing out her false teeth, which has appeared on a semi-detached house in steep Vale Street, Totterdown. The stencil mural, Aachoo!!”, had been covered up before its unveiling on Thursday morning. It shows a woman in a headscarf holding a handkerchief but dropping her walking stick and handbag as she loses her dentures while sneezing.
Vale Street is England’s steepest residential street – its 22-degree slope used during annual Easter Sunday egg-rolling competitions. ITV News West Country spoke to the owners of the house, which had a sold sign up outside, and were told they have pulled out of the sale. They were due to exchange contracts next week but the artwork could see the value of their house rocket.
Nicholas Makin, whose mother Aileen owns the property, said people had been climbing over the house to get a better look at the new piece. He told ITV News West Country that his mother was distressed by the attention and they will take time to consider what to do next.
Fred Loosmore, 28, a furniture maker who until recently rented a room in the house, told the PA Media news agency he had put a clear covering over it for protection. “We wanted to come up because people will deface it, and luckily we’ve got a workshop and a massive piece of acrylic we’ve got left over,” he said.
“When we lived here so many people would come, especially on bikes and stuff because they were trying to do the challenge up the hills. It’s a great spot. The artwork is so nice. It’s so relevant, isn’t it?”
From the Guardian. https://www.theguardian.com/artanddesign/2020/dec/10/bansky-confirms-he-created-aachoo-artwork-in-bristol