Flu cases have surged sharply with the onset of winter in the UK, pushing the National Health Service (NHS) under severe strain. The unusually early and intense spread has been labelled “super flu” in some quarters, though experts caution the term is misleading.

Despite the alarming name, medical experts stress that “super flu” is not a new disease or scientific term.
It refers to a particularly strong wave of seasonal influenza that has arrived earlier than usual this winter.

According to health professionals, the scale and severity of infections still fall within the expected range of a normal flu season. However, the timing and speed of spread have amplified its impact.

Why is flu hitting hard this year?

This year’s flu wave has struck at the very start of winter, leaving little time for health services to prepare.
UK media report that emergency departments and ambulance services are facing record pressure.

NHS National Medical Director Professor Meghna Pandit described the situation as one of the most challenging days of the year for the health system. The pressure is further compounded by the possibility of resident doctors’ strikes.

Experts explain that the influenza virus constantly changes its structure to evade the immune system. This is why flu vaccines are updated annually.

Every four to five years, the virus undergoes more significant changes, often leading to a more severe flu season. This year appears to be one such cycle.

Which flu strain is dominant?

The dominant strain this season is influenza A (H3N2). First identified in 1968, this strain has gone through dozens of changes over time.

Health specialists say it is not unusual for H3N2 to cause stronger outbreaks periodically, especially when immunity levels in the population are lower.

Schools play a major role in the spread of flu due to close contact. Children and young people are also less familiar with the virus, making them more susceptible to infection.

People over the age of 64 face a higher risk of severe illness due to age-related weakening of the immune system, known as immunosenescence.
Newborns are also vulnerable for the same reason.

Why the flu vaccine matters

Health experts strongly emphasize the importance of vaccination, especially for older adults.
Recent data shows the flu vaccine reduces the risk of hospitalisation by around 30 to 40 percent in older people.

Although this protection is lower than for some other vaccines, experts say it is consistent with previous years and remains crucial in reducing severe outcomes.

Vaccine effectiveness varies by age group.

In children, the vaccine is offering strong protection, reducing hospital admissions by about 70 to 75 percent.
Children receive the vaccine as a nasal spray, which experts say is particularly effective.

Among adults, the reduction in severe illness and hospitalisation stands at around 30 to 40 percent.
Adults are vaccinated through injection.

Experts advise people with flu symptoms to stay at home, rest, and avoid close contact with others.
This helps limit the spread of the virus, particularly to vulnerable groups.

While flu can be extremely unpleasant, specialists note that most people contract it once every five years on average and recover without needing special treatment.