All about the delta variant – And how to kill it off
As we write the UK has more Delta cases than the whole of the EU put together. The delta coronavirus variant is estimated to account for more than 98 per cent of all new coronavirus cases in the UK, according to Public Health England. And UK cases of the Delta variant have risen almost four-fold in less than a month. How come we have such a lot of cases, how different are the symptoms, what's the future looking like, and how can we kill the covid Delta variant? Here's some vital insight for you.
Delta and the volume of travellers entering the UK
Delta first made it to the UK when restrictions were being relaxed and the weather was cold, which meant the infection spread faster simply because people were spending more time indoors.
Data from Public Health England reveals the Delta variant was introduced at least 500 different times by travellers entering the UK. Dr Jeffrey Barrett, from the Sanger Institute, says he thinks the real number will end up a lot higher, more like 1000 times.
Imagine just five people infected with Delta arrive in the UK. With a bit of luck none of them would pass it on – there's no hard and fast rule about how many times the virus gets passed on, it's all about individual people's immunity, vulnerability, health, the medicines they're taking, and the setting in which they come across infected travellers – indoors or outdoors, safe or unsafe.
If not just five but 500 infected people entered the UK it's much more likely that several of them will pass on the infection and one or more might be super-spreaders. The difference between five and 500 travellers entering the UK with the Delta variant is bad enough, and the higher, more realistic estimate of 1000 is even worse.
Experts predict Delta will roll across the EU and other countries, including the USA, over the next few weeks. And in nations with lower vaccination rates than the UK, it could prove disastrous. Delta is, after all, considerably more transmissible.
Could Delta's UK take-over have been prevented? Yes. The UK's Civil Aviation Authority says a whopping 42,406 people travelled to and from India during April while Delta raged in India. Simply stopping inward flights would have given the variant much less opportunity to invade.
Back in January 2021 SAGE warned about how, "No intervention, other than a complete, pre-emptive closure of borders, or the mandatory quarantine of all visitors upon arrival in designated facilities, irrespective of testing history, can get close to fully prevent the importation of cases or new variants.” While
The government put India on the red list on 23rd April, it happened long after the World Health Organization had classified Delta as a variant of interest and long after it was known to be present in the UK. The nation's health authorities, on the other hand, left it a lot later to declare the variant 'of interest'.
On the other hand, unless we close our borders early and more or less permanently, there's no real way to stop unusually infectious new variants getting in. Only when every single human being on the planet has had two jabs will we be anywhere near safe, and that's a very long way off.
Delta's symptoms are a bit different from other variants
A high temperature and a cough have always been common for covid sufferers. A headache and sore throat are less common but still regarded as potential symptoms. A runny nose didn't count at first, with the original and other variants, but it might count for Delta.
This is because the virus is evolving. It might be that the data originally came mostly from hospital patients, who were likely to be more ill. And because there have been higher rates of vaccination – so far – in older people, we're seeing more younger people than ever catching it, who tend to get milder symptoms. But exactly why the symptoms look like they're changing? Nobody knows yet. It makes sense, in the meantime, to be vigilant. If you have a runny nose it could actually be Delta, not just the common cold.
Delta and vaccines
Johnson & Johnson has confirmed that its single-shot covid-19 vaccine generates a 'strong immune response' to the Delta variant which lasts for at least eight months after the vaccination date. Blood sample analyses revealed the vaccine created a stronger immune response to the Delta variant compared to the Beta variant. Early results also suggest the Pfizer/BioNTech, Moderna and Oxford/AstraZeneca vaccines are 'largely protective' against Delta.
How to kill the Delta variant
UVC light has been used widely in healthcare settings for decades. It kills off viruses as nasty and frightening as Ebola, MERS and SARS, and also kills covid variants quickly and efficiently. If you want to keep your premises safe from covid, whatever the variant, let's talk.









