Covid-19 Risk Assessment Week Ending 22 November 2021

There is alarming Covid-19 news this week for Buckinghamshire. The number of infected people is RISING FAST again after the ‘half-term dip’, and the number of people in Bucks hospitals with Covid-19 has JUMPED by a quarter. Deaths are remaining constant. The risk of catching Covid-19 when out and about in Bucks remains VERY HIGH. As we go into the winter, the pandemic in Bucks remains a very real threat to the NHS and to everyone.

Read on for more.



Doctors and scientists are increasingly saying that people should not regard themselves as ‘fully vaccinated’ against Covid-19 until they have had THREE doses of vaccine – i.e. the two doses already rolled out plus the third so-called ‘booster’ dose. This idea that three doses are needed before you should think of yourself as ‘fully vaccinated’ needs to sink into everyone’s thinking.

Being ‘fully vaccinated’ (three doses) means you have a good chance of not immediately being seriously ill if you catch Covid-19, although vaccination doesn’t protect so much against the longer-term effects like organ and brain damage. If you haven’t had three doses, like most of the population, you should not be thinking you are ‘safe’ from Covid-19.

The third vaccine dose is now available to clinically vulnerable people and all adults over 40. If you’re eligible for a third dose, get it as soon as possible.



The media, Government and businesses are all sending the message that Christmas this year can be completely normal – you can go to parties, cinemas and shows, go shopping in crowded stores, and have people around to your home whenever you like. Many people are thinking that two doses of vaccine means they are ‘safe’ to catch Covid-19. Sadly, this isn’t true. Covid-19 hasn’t gone away – in fact it has become even more infectious and easier to catch, and thousands of people in Bucks are getting seriously ill and some are dying every week of Covid-19.

The sad fact is that, if you have a ‘normal Christmas’, there is a very high chance that you will catch Covid-19. Vaccination may or may not protect you from being seriously ill, but it won’t protect so much from Long Covid or developing other serious conditions. Not catching Covid-19 at all is still the safest idea.

BuDS will be publishing advice and guidance on meeting people more safely at Christmas soon, but in the meantime please DON’T FOLLOW THE CROWD. Keep yourself and your loved ones safe by continuing to be Covid-Careful.

Covid-Careful doesn’t mean shielding or complete self-isolation – meeting friends and family is vital for mental health, and it is still safe to meet OUTDOORS if you take sensible precautions (read our article or watch our video to learn more). But EVERYONE now should be meeting as few people outside their household as possible, and avoiding crowds, events and indoor places like shops, restaurants, and pubs.



Delta Plus (the new variant now widespread in Bucks) and Delta are airborne viruses – they travel mainly in the air breathed out by infected people. So, the three best ways to protect yourself are:

  1. Getting vaccinated against Covid-19 and getting your third (‘booster’) dose as soon as you can. Vaccination with THREE doses will help you avoid getting seriously ill if you catch Delta or Delta Plus.
  2. Making sure you are breathing clean fresh air, not air contaminated by other people’s breath. This means opening windows wide or being out of doors when you meet people who might be infected, especially children and young people. Young primary school children, who rarely show any sign that they are infected, are a particular risk.
  3. Keeping well away from people who might be infected and breathing out the virus, by avoiding indoor places as much as possible and socially distancing even outdoors.

Wearing a loose cloth face-covering yourself, washing your hands and using hand sanitiser are still important but these precautions are not as effective against Delta and Delta Plus because the virus mainly travels by air.



If you need help or support or you’re anxious about Covid-19, BuDS is here for you. Please e-mail, call 01494 211179 (voicemail) or message us and we’ll do all we can to help.



You catch Covid-19 from other infected people, so knowing how many infected people are around in your community is the most important fact when looking at risk. BuDS uses 4 separate sets of official data to make sure we can give you the best and most balanced picture of the risk from Covid-19 in Bucks. We are not trying to make precise mathematical calculations but assess whether the number of infected people in the local community is going up or down.



The UK Health Security Agency (a body controlled by the Government) counts the number of people who test positive for Covid-19 using either a laboratory PCR test or a lateral-flow test kit later confirmed by a PCR test. BuDS adds together the daily positive test totals over the last two weeks, because people generally have Covid-19 and are infectious for about two weeks. This gives us a total number of people who have tested positive for Covid-19 and are still infectious. This total still underestimates the true number of infected people in the community, because lots of people who have Covid-19 don’t get tested or don’t report a positive test. So, BuDS increases the number of people testing positive to try to take account of the people who are positive but don’t get tested or report a positive test.

Last week, after making the calculations shown above, we said there were 6,715 infected people in Bucks. After revision of the test data by UKHSA, it turns out that the total was actually 7,061. That means last week the number of reported positive tests was fairly stable with a drop of only 2% – we originally reported a 6% fall.

On the data we have from UKHSA, this week we calculate there are 8,292 infected people in Bucks,1 which (taking last week’s revised total into account) means that the number of infected people in Bucks measured by UKHSA tests has risen by 17% this week. The ‘half-term dip’ in infections is now over and it is very likely that the number of infected people, and the associated risk, will continue to increase as we go into the winter and the Christmas season.



The UK Health Security Agency uses a range of surveys and test data every week to calculate the ‘R Rate’ for Covid-19.2 The R-rate measures how quickly the number of people infected with Covid-19 is growing or shrinking. The R Rate is now calculated by UKHSA to be 1.1 in the South-East. Using the average R Rate for the South-East of England, including Bucks, we calculate that last week there were 7,136 infected people in Bucks, and this week there are 6,581, a fall of around 8%. R-Rate calculations usually lag a week behind test data, so this difference is not unexpected.



Thirdly, using the maximum R Rate for the South East of England, including Bucks, we calculate that there were 7,855 infected people in Bucks last week, and now there are 7,514, a fall of around 4%.



The Office for National Statistics (which is independent of Government) test a random sample of 50,000 people across the UK every week, whether they are ill or not, to see how many have Covid-19. This Infection Survey is the most reliable way of estimating how many people have Covid-19, because it doesn’t rely on people choosing to get a test or report a positive result.3 Unfortunately, the survey results are slow to come out – the latest fully-comparable figures we have are for the week ending 8 November, 2 weeks ago. That data shows a fall (-21.2%) in the number of infected people across the South East as a whole, which is about the same as the 23% fall we saw in reported positive tests in Bucks in that week. The ONS consistently finds more infected people in Bucks than is shown by reported positive tests.



Looking at all the data, it is clear that the risk from Covid-19 in Bucks is HIGHER than last week, and is still VERY HIGH. Depending on the test data you use, the number of infected people has gone from between 6,700-7,800 to between 6,500-8,300. 1 in every 66 people in Bucks are infected with Covid-19.



Using the UKHSA test data, which we think this week is the most likely to be accurate,4 we have calculated that there are 8,292 people infected with Covid-19 in Bucks this week. At least some of these infected people in Bucks will be showing symptoms and self-isolating or been told to self-isolate by Track and Trace. Some may be in hospital or have died. However, for the purposes of calculating risk, we will take the ‘worst case’ scenario and assume that every infected person is still out in the community potentially able to infect you. How likely are you to meet them?

How many infected people in every 1000?5 – 15

How many infected people in Aylesbury?6 – 915

How many infected people in High Wycombe?7 – 1,829

How many infected people in Amersham?8 – 413

How many infected people in Chesham?9 – 407

How many infected people in Buckingham?10 – 229

How many infected people in Burnham?11 – 173

How many infected people (adults or children) in a large school?12 – 23

How many infected people in a busy town centre?13 – 152

How many infected people at a large public event?14 – 305

How many infected people in a busy shopping centre?15 – 15

How many infected people in a busy supermarket?16 – 5

Remember, people infected with Covid-19 move about. The figures above show a theoretical number based on population or crowd size to help you get an idea of the likely number. Also, you don’t necessarily have to meet 66 people to meet one with Covid-19. The first person or child you see in the street or supermarket might be the one person with Covid-19.



The pressure from Covid-19 on Bucks hospitals has risen again this week, remaining HIGH. Last week, according to NHS data, 281 people were admitted to Bucks hospitals for the first time with symptoms of Covid-19 or were admitted to hospital for other reasons and found to have Covid-19 when tested in the hospital, up from 225 the week before (24.9%). Covid-19 continues to lead to the cancellation of operations and delays to other urgent hospital treatment for the residents of Bucks. Like every other ambulance service in England, South Central Ambulance Service, which covers Bucks, has declared an emergency several weeks in a row.



2 people were recorded as dying in Bucks last week within 28 days of a positive Covid-19 test, and 3 people were recorded as dying in Bucks last week within 60 days of a positive Covid-19 test. This brings the number of deaths in Bucks since the pandemic began to 1049 within 28 days or 1253 within 60 days.

 The ONS also measure the number of people dying of Covid-19 using death certificate data. This is the most reliable data by far, but publication is significantly delayed. The most recent comparative date we have is 5 November. On that date, the ONS found that 1268 people had died in Bucks of Covid-19 since the start of the pandemic, compared to 1042 within 28 days of a positive test and 1243 within 60 days of a positive test (as reported by the UKHSA). It is clear that the UKHSA reported figures understate the numbers of people dying of Covid-19.



The vaccination programme in Bucks remains a story of two halves: activity around children and already vaccinated adults, but not much change for unvaccinated adults. Last week, practically the only change was in the number of ‘two-dose’ adults getting their third dose. There was very little change in the number of partly-vaccinated children and teenagers and none for unvaccinated adults.

  • 51.9% of 12- to 15-year-olds in Bucks have had one dose, up 1% on last week. Almost none (0.3%) have had a second dose.
  • 69.0% of 16- & 17-year-olds in Bucks have had one dose, up 1% on last week. 16.1% have had two doses.
  • 84.9% of adults 18 to 70 in Bucks have had one dose, almost unchanged on last week. 81.3% have had two doses.
  • 96.7% of adults over 70 in Bucks have had one dose, unchanged on last week. 96.0% have had two doses.
  • Overall, 84.3% of the people on the NHS vaccine register in Bucks have had a first dose and 76.9% have had a second dose.

This may sound reassuring, but very large numbers of people in Bucks have still to receive any vaccine or cannot be vaccinated for clinical reasons. They include 14,287 12-15-year-olds, 4,398 16 & 17-year-olds, 56,808 adults under 70 and 2,574 adults over 70. In total, around 124,000 people in Bucks of all ages have not yet received even a single dose of vaccine.

Please note that the Government are not yet publishing local statistics for the numbers of people receiving third or ‘booster’ vaccine doses. As soon as they do so, we will add them to this article.



The key message for EVERYONE hasn’t changed: this is a time to you to ACT TO PROTECT YOURSELF from both Covid-19 and Long Covid by being Covid-Careful.



If you need advice on how to keep yourself safe, or any other form of help or support, or you’re anxious about Covid-19, BuDS is here for you. Please e-mail, call 01494 211179 (voicemail) or message us and we’ll do all we can to help.



To read the rest of our articles about Covid-19, use this link:

To learn more about the people who are more likely to die or have serious illness if they catch Covid-19, use this link:

To learn more about Long Covid, use this link:

To learn more how to be safer when going out, use this link:

If you want to see the sources used for this article, use this link:

To read our past risk posts, use this link:

To see how we calculate the figures used in this post in more detail, use this link:  



BuDS will put out another Covid-19 update next week using the latest figures.



Please share this article on social media, but always credit BuDS. If you need help or support or you’re anxious about Covid-19, BuDS is here for you. Please e-mail, call 01494 211179 (voicemail) or message us and we’ll do all we can to help.



[1] Using data from The raw test figures are added together and adjusted to account for asymptomatic cases based on scientific data, in order to create a rolling two week average which best represents the number of infected people in Bucks this week. This rolling average is the figure that we use in the post.

[2] Using data from The figure quoted is calculated in the same way as the rolling average figure described in reference 1, but using the R number to estimate the number of positive cases rather than UKHSA test data.

[3] For information on the infection survey, including the data collected (which is used by BuDS to calculate this estimate for Bucks), see or for the weekly reports

[4] The ONS Infection Survey historically consistently reports more infected people than any of the other measures we use, so we think the UKHSA test data is more likely to be correct this week as it is the highest of the up-to-date data sources available.

[5] Population of approx. 543973 based on 2018 survey data,

[6] Population of approx. 60,000 people, from,of%20over%2060%2C000%2C%20the%20largest%20in%20Aylesbury%20Vale.

[7] Population of approx. 120,000 people, from

[8] Population of 27,077 as of the 2011 Census, from

[9] Population of 26,718 as of the 2011 Census, from

[10] Population of approx. 15,000 people, from

[11] Population of approx. 11360 as of the 2011 census, from,_Buckinghamshire#cite_note-ons-1

[12] Assuming pupils plus staff equals 1500 people in total

[13] Assuming 10,000 people present at any one time

[14] Assuming 20,000 people present at any one time

[15] Assuming 1000 people present at any one time

[16] Assuming 300 people present at any one time