Newest COVID strain: key facts and how to stay safe

In July 2025 health officials flagged a fresh COVID variant spreading across the UK. It’s being called the “XBB.1.16” strain in technical reports, but you don’t need the code to stay safe. Below we break down what’s new, how it feels, and what steps you can take right now.

The new strain shows a higher transmission rate than the previous wave. Early data suggest it spreads a bit faster in crowded places, but most cases still end up mild for healthy adults. Kids and older people with health issues may still face a tougher fight, so keeping an eye on symptoms is a good idea.

Typical signs include a sudden sore throat, runny nose, and a dry cough that can linger. Some people report a light fever (under 38°C) and body aches that fade within a couple of days. Loss of taste or smell is much rarer this time, which helps separate it from older variants.

It’s easy to mix this up with a common cold. The main clue is the speed at which symptoms show up – COVID often hits within 2‑3 days after exposure, while a cold can take a bit longer. If you have a sore throat plus a dry cough and fever, testing is the safest bet.

What makes this strain different?

The virus has shuffled a few of its spike‑protein pieces, giving it a slight edge at dodging past immunity. That means some people who were fully vaccinated or had a previous infection might still catch it, though the illness usually stays mild. Current boosters still work well at preventing severe disease, so getting a recent shot is still worth it.

Case numbers have risen from a few dozen in early July to several thousand by mid‑month, mainly in London and surrounding counties. Health agencies are monitoring hospital admissions, which remain low, indicating the strain isn’t overwhelming the system yet.

How to protect yourself and others

The fastest protection is a fresh booster if you’re eligible – it raises your antibodies and cuts the risk of serious illness. Wearing a mask in indoor public spots, especially on public transport, still cuts transmission. Good ventilation helps too; open a window if you can.

If you feel any of the symptoms above, grab a rapid antigen test at the pharmacy or request a free PCR test through the NHS. Positive? Isolate at home for at least five days and avoid close contact with vulnerable folks. Stay hydrated, rest, and keep an eye on your temperature.

Stay tuned to reliable sources like London Trends for daily updates. Knowing the latest numbers and guidance means you can make quick, smart choices for you and your family.