“It’s curtains” clearly means “the end” or “an adverse ending to something.”
So, the more ambiguous portion of my opening question is, which Corona?
A more sober analysis may reveal the searching spike was from those looking for silly memes to share, not evidencing any mistaken belief of a real connection.
Indeed, the beer brand is not concerned about confusion: “Consumers, by and large, understand there’s no linkage between the virus and our beer/business.”
As to the beer brand, despite a late night comedian’s assertion that Corona beer sales actually have suffered from confusion, curtains aren’t likely for the brand.
Actually, even if there was a drop in January Corona beer sales, it might be better explained by the growing interest in drinking less during Dry January.
On January 8, 2020, Corona filed this logo — had it come two weeks later, perhaps it would have included another type of needed protection, given the virus crisis:
Truth be told, there are actually lots of Corona brands and trademarks out there.
“Corona” is presently federally-registered in the U.S. by a multitude of others for products and services as diverse as chocolates, wine, jewelry, cotton fabric, corn-grinders, meat choppers, plastic food product containers, dinnerware, toilets, toothbrushes, ointment, pruning shears, book-binding machines, accordions, electric heaters, oil stoves, personal headlamps, spectrometers, laboratory instruments, paint brushes, environmental services, gymnastic mats, computer software, animal shampoo, dog and cat food, and order fulfillment services.
Maybe a silver lining in the story for Corona beer, is that the unsolicited media attention may indicate strong trademark rights in the face of this crowded field.