CIDRAP | PeopleImages/iStock
In a study of more than 1.1 million older Danish adults, researchers found that grandparents were 10% more likely to test positive for the coronavirus in the week after a grandchild’s birthday than during other times. The study included almost 1 million grandchildren, whose medical records were linked to those of their grandparents. The study was made possible because of Denmark’s comprehensive national healthcare system, which records every medical or pharmacy visit, as well as the country’s population registry.