President Biden’s dog Major on Monday afternoon bit another employee, who then required medical attention. The encounter took place on the White House South Lawn Monday. CNN first reported the bite, adding that the employee worked for the National Park Service.
Monday’s incident was the second time Major, a three-year-old German Shepherd, bit someone at the White House in less than a month. On March 8, Major sunk his teeth into a Secret Service employee, who also required attention from the White House medical unit. Psaki referred to that incident as "minor."
Source: Biden's dog Major bites another White House employee
So was this just a nip or something more serious. My rule of thumb is did the bite break the skin. If my dog bites someone and this results in bleeding, I take that very seriously. According to the Internet:
Although you can provide first aid for a dog bite at home, it's very important to see a doctor, especially if an unfamiliar dog bit you, the bite is deep, you can't stop the bleeding, or there are any signs of infection (redness, swelling, warmth, pus). Dog bites can cause infections that need to be treated with antibiotics. People with diabetes, liver disease, illnesses that suppress the immune system, and other health conditions may be at greater risk for a more severe infection.
And according to CDC, dogs can spread the coronavirus. Thus a dog bite is a potential transmission vector.