Come rain or shine, the royal family members are always out and about on official engagements, and while we're sure they love meeting and greeting the public, it could spell trouble for their health – especially when they're meeting so many people on a daily basis.
"The viruses that cause colds or flu spread more easily when we're in constant close contact with other people," confirms Claire Nevinson, Superintendent Pharmacist at Boots.
"A virus can also survive on hands and surfaces for about 24 hours and can be transmitted through handshakes and other forms of contact, so interacting with lots of people daily can increase the risk of infection," Claire cautions.
With the royals known for shaking hands, and even sometimes hugging those that they meet, this could increase their likelihood of becoming unwell.
The fact that many royals engage in walkabouts in the chilly weather could be a concern too. "You may wish to avoid spending time outside in the cold if you aren’t feeling well, and if you have more severe cold symptoms, such as a fever, chest congestion or a cough, being out in the cold could prolong your recovery or worsen your illness.
While the royals have a chic collection of coats, wrapping up warm is key if they want to remain fit and healthy for the Christmas season, with Claire emphasising the importance of wearing our woollies this winter.
“Even if you are well and you choose to go out in the cold it’s generally advised to wrap up warm, by wearing lots of layers and clothes made from cotton, wool or fleecy fibres as these are particularly good at helping to maintain body heat."
Avoiding the flu or a cold is particularly important for King Charles, Queen Camilla and Princess Anne, as they're over the age of 65.
"People in this age bracket are more likely to develop potentially serious complications from flu," says Claire.
Read on for Claire's advice for staying well this winter...
Royally obsessed? Listen to the latest episode of HELLO!'s Right Royal Podcast to find out the inside scoop on what it's like to become part of the royal family.