Winter always tests the NHS. This year, it feels sharper. Across Europe, health leaders report very high flu activity. In the UK, hospitals already juggle flu, colds, and other seasonal bugs.

Now, doctors also watch a “B” strain that often arrives later in the season. Flu B tends to spread through schools first. Then it reaches families at home. As a result, communities can see a fresh wave after Christmas.

So what should you look for? Flu B usually hits fast. Many people wake up with fever or chills. They feel heavy body aches and sore muscles. They also notice a headache and deep fatigue. Next, congestion builds. A runny or blocked nose follows. A sore throat often joins in. Some people also feel nauseated or vomit.

Meanwhile, the bigger worry sits with those who carry extra risk. Asthma, diabetes, heart disease, cancer, and pregnancy can all raise the chance of serious illness. Age can, too. That’s why many experts still stress vaccination to reduce severe cases.

Finally, pressure matters. Staffing and winter demand can stretch services for weeks. So act early. Rest. Hydrate. Seek medical advice quickly if symptoms hit hard, last, or worsen—especially if you fall into a higher-risk group.