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UK Health Security Agency engagement report

@UKHSA - 465K followers on X

Measured over 36 original posts from a 30-day window, last computed on August 29, 2026.

Engagement

Middle of its size range
Per follower
0.008%
of 465K followers
Per impression
0.32%
12K views on a typical post
Reach
2.59%
of its followers see a post
Typical post
38
interactions (median)
Saved
0.017%
2 bookmarks on a typical post
Posting rate
1.67/day
active 63% of days
Peak time
09:00 UTC
Friday

A typical post picks up 38 interactions against 465K followers, an engagement rate of 0.008%. Measured over 36 original posts, its engagement rate beats 28% of 3,829 tracked accounts of a similar size, which puts it in the middle of its size range rather than at either end. Posts are seen about 12K times each, and 0.32% of those impressions turn into an interaction. That is about 2.59% of the follower count, which is the gap between an audience on paper and an audience in a timeline. Posting runs at about 1.7 posts a day over the last 30 days, with activity on roughly 63% of days. Most posts go out around 09:00 UTC, and Friday is the busiest day of the week. Of the 36 posts sampled, 92% carry an image or video, 22% are part of a thread and 56% link out. The account's strongest tracked post pulled 201 interactions, about 5.3x its own typical post.

Measured over 36 original posts from a 30-day window, last computed on August 29, 2026. Recurring tag: #salmonella.

Compared with accounts its own size

UK Health Security Agency's engagement rate beats 28% of the tracked X accounts closest to it in follower count (3,829 accounts, accounts of similar size (decile 7 of 10)). A percentile is spread evenly by construction, so 50 really is the middle of that group and 90 really is its top tenth.

On engagement per impression rather than per follower it beats 24% of the same group. When those two numbers disagree, the gap is about how far its posts travel rather than how people react to them.

Where this sits in the catalog

At 0.008%, UK Health Security Agency sits above the 10th percentile of the 37,214 accounts in this comparison. That places it in the bottom 25% band, which runs below 0.012%.

p100.002%
p250.012%
p50 (median)0.081%
p750.436%
p902.10%
p99160.2%
Engagement rate as a share of followers, across the 37,214 accounts we have scanned enough to measure. The axis is logarithmic, because the top and bottom of this population are about 106,785 times apart and a linear axis would flatten everything below the median into a single point.
Show the percentile table
Engagement rate percentiles
PercentileEngagement rate
10th percentile0.002%
25th percentile0.012%
50th percentile0.081%
75th percentile0.436%
90th percentile2.10%
99th percentile160.2%

This ruler is the whole measured catalog, not a size-matched group: it shows where the raw rate falls across every account we can measure, all of which are large. For a like-for-like comparison, read the size-band percentile above instead. See how the bands are built

Posting timing

This account posts most often around 09:00 UTC, and Friday is its busiest day of the week. The bars below are the catalog-wide pattern, with this account's own busiest slot marked. They do not show how this account performs at each hour: we keep one aggregate per account, not one per hour, so that measurement does not exist in our data.

Engagement by hour posted, UTCTwenty-four bars, one per UTC hour. Each bar shows how posts published in that hour compare with their own authors' median engagement. Bars above the centre line ran higher than the median, bars below ran lower. A marker flags Busiest hour: 09:00 UTC.
0003060912151821
Above the authors' own mediansBelowScale: plus or minus 6%Busiest hour: 09:00 UTC
Show engagement by hour posted, utc as a table
Engagement by hour posted, UTC
Hour (UTC)Vs author medianPosts
00:00 UTC-1%51K
01:00 UTC-2%52K
02:00 UTC-3%51K
03:00 UTC-4%54K
04:00 UTC-6%44K
05:00 UTC-4%42K
06:00 UTC-4%49K
07:00 UTC-5%53K
08:00 UTC-4%61K
09:00 UTC-3%71K
10:00 UTC-2%73K
11:00 UTC-3%80K
12:00 UTC-2%88K
13:00 UTC-2%96K
14:00 UTC-4%99K
15:00 UTC-2%103K
16:00 UTC-3%100K
17:00 UTC-2%92K
18:00 UTC-1%86K
19:00 UTC-2%81K
20:00 UTC-1%75K
21:00 UTC-1%67K
22:00 UTC-1%58K
23:00 UTC-1%52K
Engagement by day of weekSeven bars, one per weekday, Sunday first. Each bar shows how posts published on that day compare with their own authors' median engagement. Bars above the centre line ran higher than the median, bars below ran lower. A marker flags Busiest day: Friday.
SunMonTueWedThuFriSat
Above the authors' own mediansBelowScale: plus or minus 5%Busiest day: Friday
Show engagement by day of week as a table
Engagement by day of week
DayVs author medianPosts
Sunday+5%234K
Monday0%294K
Tuesday-3%288K
Wednesday-1%253K
Thursday-2%247K
Friday-3%256K
Saturday+3%230K
See what moves engagement across the whole catalogWhat counts as a good engagement rate at this size

Best tweets

  • Aug 10, 20265.3x their median

    โš ๏ธ An Amber Heat-Health Alert has been issued across a majority of England, while the North East is under a Yellow Alert. These alerts are in place from 9am on Tuesday 11 August until 9am on Friday 14 August. https://t.co/nZwSp0bFCu

    8978161839K viewsView on X
  • Aug 13, 20263.9x their median

    Great news for new parents: intensive care admissions for RSV in babies have halved in England, thanks to the maternal vaccination programme. ๐Ÿ‘ถ๐Ÿ‘ถ๐Ÿพ๐Ÿ‘ถ๐Ÿผ If you're pregnant, don't miss out. Contact your maternity service or GP practice to get vaccinated & help protect your newborn. https://t.co/U7WSlZ0M9s

    834515720K viewsView on X
  • Aug 6, 20263.2x their median

    On 12 August, a partial solar eclipse will be visible across the UK. If you want to use eclipse glasses make sure they are genuine with specially designed filters that meet the international safety standard. ๐Ÿ”—: https://t.co/445YChOLjY https://t.co/9WbGUDd7O0

    75424218K viewsView on X
  • Jul 27, 20263.0x their median

    ๐ŸŸ โš ๏ธ An Amber Heat-Health Alert has been issued across the East Midlands, East of England, London and South East, with a Yellow Heat-Health Alert in place across Yorkshire, the West Midlands and the South West. Alerts in place from 9am Wed 29 July until Thurs 30 July at 9am. https://t.co/OxHTvCmOZZ

    53466991K viewsView on X
  • Aug 14, 20263.0x their median

    The polio vaccine, once given on a sugar cube in the UK, has helped protect millions from a life changing disease. Thanks to the NHS vaccination programme, polio is now extremely rare in the UK. Vaccination works. โœ… https://t.co/aZwfRhKTzF

    71357012K viewsView on X
  • Aug 21, 20262.2x their median

    If you're walking through grassy or wooded areas this weekend, be tick aware and make sure you know how to avoid ticks and check for them as soon as you get home. ๐Ÿ‘‡ https://t.co/1RMd88fOKt

    37385512K viewsView on X
  • Aug 28, 20262.2x their median

    Flu season is approaching, and eligibility for the free NHS flu vaccine has changed for autumn 2026. More children can be vaccinated in community pharmacies and, for the first time, rough sleepers can get vaccinated. Check who's eligible & how to book๐Ÿ’ช https://t.co/69wK5YKr4v

    343311421K viewsView on X
  • Aug 3, 20261.9x their median

    โš ๏ธ An amber Heat-Health Alert has been issued for East Midlands, East of England, South East of England, & London. A yellow Heat-Health Alert is in place for all other regions of England apart from the North East. Alerts are in place from 9am Monday 3 to 9am Wednesday 5 August. https://t.co/9bpK356DmY

    28347580K viewsView on X
  • Aug 11, 20261.7x their median

    Donโ€™t "strain" your eyes trying to see the solar eclipse... ๐Ÿฒ๐Ÿ‘€ If you donโ€™t have eclipse glasses, a kitchen colander can be used to safely project the eclipse onto a surface. ๐ŸŒž๐ŸŒš Find out more about solar eclipse safety in our blog post: https://t.co/445YChOLjY https://t.co/aU7jCaobvb

    31263415K viewsView on X
  • Aug 10, 20261.6x their median

    The only thing rusty about tetanus is our collective memory of just how serious it can be. Thanks to vaccination, tetanus is now rare in the UK, but it only remains rare if children continue to get routinely vaccinated. https://t.co/dm0xKq3nLD

    33215212K viewsView on X

Ranked by total interactions across everything we have tracked for this account, which is a longer history than the 30-day window the rates above use. The multiple compares each post to this account's own median.

Recurring topics

#salmonella

The most frequent hashtags in the sampled posts. They describe what this account writes about; they are not a performance signal, and the catalog-wide breakdown on the hub shows how little hashtag count moves.

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Reading these numbers

A typical post picks up 38 interactions against 465K followers, an engagement rate of 0.008%. Measured over 36 original posts, its engagement rate beats 28% of 3,829 tracked accounts of a similar size, which puts it in the middle of its size range rather than at either end. Posts are seen about 12K times each, and 0.32% of those impressions turn into an interaction. That is about 2.59% of the follower count, which is the gap between an audience on paper and an audience in a timeline. Posting runs at about 1.7 posts a day over the last 30 days, with activity on roughly 63% of days. Most posts go out around 09:00 UTC, and Friday is the busiest day of the week. Of the 36 posts sampled, 92% carry an image or video, 22% are part of a thread and 56% link out. The account's strongest tracked post pulled 201 interactions, about 5.3x its own typical post.

What is UK Health Security Agency's engagement rate on X?
UK Health Security Agency (@UKHSA) has an engagement rate of 0.008%, based on the median interactions across 36 original posts from the last 30 days against 464,542 followers. Replies, reposts and quote-posts of other people are excluded from that sample.
Is that a good engagement rate?
At 0.008%, UK Health Security Agency sits above the 10th percentile of the 37,214 accounts in this comparison. Those comparison accounts are all large ones, because our scanning cadence is weighted towards big accounts, so this is a ranking among peers of similar scale rather than a ranking across X.
Does @UKHSA have real engagement?
Its engagement rate beats 28% of the tracked X accounts closest to it in follower count (3,829 accounts), which puts it in the middle of its size range group. Ranking inside a size band matters because engagement rate falls as accounts grow, so a raw rate would mostly re-measure the follower count. It is a starting point for a look at follower quality, not a verdict on it.
When does @UKHSA post?
Most posts go out around 09:00 UTC, and Friday is its busiest day, at roughly 1.67 posts per day across the measured window.

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