COVID-19 data: including cases in Bristol and R number for the South West

COVID-19 data: including cases in Bristol and R number for the South West

Information about the number of new cases, number of community tests, the growth rate of infections, number of deaths and the latest R (reproduction) number for the South West.

COVID-19 bi-weekly Bristol statistics update

We aim to publish a COVID-19 bi-weekly Bristol statistics update twice a week, on Tuesday and Friday afternoons. This may be delayed until the following day, depending on when data is made available. 

These numbers do change daily but were accurate when published on the date stated on the report.

The bi-weekly report is an overview of the latest COVID-19 data for Bristol including:

  • the number of COVID-19 cases in Bristol in the past week
  • the number of community tests undertaken
  • the number of new cases of the virus
  • growth rate of infections
  • number of registered deaths
  • the R (reproduction) number for the South West

Estimates of the R number at a local authority level are not reliable due to the relatively small number of cases and deaths occurring at this geographical level.  In order to calculate a reliable estimate of R, a large number of cases is required. If the number of cases and deaths is small, the margin of error will be too big, making the figure inaccurate.

The statistics update:

COVID-19 terms explained

Community tests

Tests not carried out in a hospital, such as at a Local Testing Site, a Mobile Testing Unit or via home tests (delivered directly to people’s homes).

Growth rate

An estimate, for the whole South West region, of the change in the numbers of new cases of COVID-19 from one day to the next. Expressed in terms of a percentage change. For example, a growth rate of 2% suggests that 100 cases one day would mean 102 cases the next day.

R (Reproduction) number

An estimate of the average number of people that one infected person will pass the virus on to. For example, if the R number is 1, that means on average every person infected with COVID-19 will go on to infect one more person. If the R number is greater than 1 the epidemic is growing. If the R number is less than 1, the epidemic is shrinking.

Infection rate

Reported in terms of the numbers of new cases per 100,000 (i.e. individuals with a positive test result for COVID-19, that have not had one previously), typically counted over the last seven days that we have reliable data for, and expressed as a proportion of the population of the city (approximately 463,000).

Confirmed cases

The number of individuals with a positive test result for COVID-19 that have not had one previously.

Other sources of data

Number of lab-confirmed cases (on Open Data Bristol).

Central government COVID-19 data.