I don't know about in the UK, but here in Australia what has been found is that the Delta strain appears to be more contagious and is infecting groups that were previously less susceptible.
Our vaccination program has focussed on front line and aged people for example, children may have been overlooked at that time, but they are now being found to be more susceptible.
As I understand it, the vaccine does not make you immune. It lessens the effect of symptoms that a person will experience.
If we are now dealing with a far more easily transmissible variant, since the virus can be transmitted by contact, being vaccinated may make us more complacent and that may cause a rise in exposures and ultimately infections.
To give you an idea of how the Delta variant can be transmitted, a couple tested positive here in Victoria after several days into their 14 day hotel quarantine. When CCTV footage and interviews were conducted, it was found that the only way this could have occurred is a known infected couple had their room door open to grab their meal for the night and the unaffected people opened their door at the same time. The two doors were about 4 metres apart in the hotel and the overlap time of the doors both being open was 18 seconds. No physical contact whatsoever.
Any of the daily case number reports that we have is a lagging indicator by at least 3 days. People can be positive, not know that they are and move around in the public. Once the contact tracers do their job, you are looking at another several days for exposure sites and people to be identified. The lag length keeps increasing. We had one infected case that in two days visited 6 venues and has caused all of these places to have to close for cleaning and has exposed hundreds of people. The people have then travelled home and gone about their business and have exposed hundreds. If you do not understand how quickly this can escalate into a massive number, start with 1 and then keep doubling. 1,2,4,8,16,32,64,128,256,512,1024. That is just eleven doubles. If you multiply that by 10, being conservative, you now have 10,20,40,80,160,320,640,1280. That is just after 8 doubles. Victoria has now identified 237 Tier 1 exposure sites. Try the same exercise starting at 237. That is assuming that only one person becomes infected from each exposure site. Likely or not likely? Our contact tracers are going out to the seventh level. I would estimate we are talking about tens of thousands of contacts from potentially one person in. the community.
For whatever reason, our vaccination rates are not high. The restrictions that we find ourselves under are the best measures that we have to prevent infection rates spiralling out of control. Personally, at this point, I can't really see any viable option? If this virus was to get into our isolated first people communities, it would decimate them.
I have friends that don't believe in what is being done and friends that do. Friends that are going to, or have been, vaccinated and others that think it is a worldwide conspiracy right up there with contrails and the shape of the planet. The other day, a neighbours father in law actually asked my wife whether Covid-19 was real. It must be an awfully big rock that he has been living under.
Gosh, I hope I made sense there.