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Harvard Health engagement report

@HarvardHealth - 2.4M followers on X

Measured over 6 original posts from a 30-day window, last computed on October 25, 2026.

Engagement

Per follower
0.002%
of 2.4M followers
Per impression
0.349%
16K views on a typical post
Reach
0.67%
of its followers see a post
Typical post
55
interactions (median)
Saved
0.105%
16 bookmarks on a typical post
Posting rate
0.2/day
active 20% of days
Peak time
14:00 UTC
Monday

Early reading. We have captured 6 original posts for this account, below the 8 we require before treating a median as settled. The numbers above describe what we have seen so far, not a finished profile of the account.

A typical post picks up 55 interactions against 2.4M followers, an engagement rate of 0.002%. Posts are seen about 16K times each, and 0.349% of those impressions turn into an interaction. That is about 0.665% of the follower count, which is the gap between an audience on paper and an audience in a timeline. Posting runs at about 0.2 posts a day over the last 30 days, though only 20% of days saw any activity at all. Most posts go out around 14:00 UTC, and Monday is the busiest day of the week. Of the 6 posts sampled, 100% link out. The account's strongest tracked post pulled 1.2K interactions, about 22x its own typical post. Only 6 original posts have been captured so far, fewer than the 8 posts we want behind a median before treating it as settled. Read the figures above as an early measurement of this account, not as a finished profile of it.

Measured over 6 original posts from a 30-day window, last computed on October 25, 2026. Recurring tag: #harvardhealth.

Where this sits in the catalog

At 0.002%, Harvard Health sits below the 10th percentile of the 204,491 accounts in this comparison. That places it in the bottom 25% band, which runs below 0.024%.

p100.004%
p250.024%
p50 (median)0.143%
p750.677%
p902.55%
p9982.4%
Engagement rate as a share of followers, across the 204,491 accounts we have scanned enough to measure. The axis is logarithmic, because the top and bottom of this population are about 22,891 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 percentile0.004%
25th percentile0.024%
50th percentile0.143%
75th percentile0.677%
90th percentile2.55%
99th percentile82.4%

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 14:00 UTC, and Monday 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: 14:00 UTC.
0003060912151821
Above the authors' own mediansBelowScale: plus or minus 111%Busiest hour: 14:00 UTC
Show engagement by hour posted, utc as a table
Engagement by hour posted, UTC
Hour (UTC)Vs author medianPosts
00:00 UTC-1%89K
01:00 UTC-2%90K
02:00 UTC-3%88K
03:00 UTC-4%94K
04:00 UTC-5%76K
05:00 UTC-4%75K
06:00 UTC-5%86K
07:00 UTC-5%93K
08:00 UTC-4%108K
09:00 UTC-4%124K
10:00 UTC-3%129K
11:00 UTC-3%141K
12:00 UTC-3%154K
13:00 UTC-3%167K
14:00 UTC-4%173K
15:00 UTC-2%176K
16:00 UTC-3%171K
17:00 UTC-3%159K
18:00 UTC-2%149K
19:00 UTC-2%141K
20:00 UTC-1%131K
21:00 UTC0%116K
22:00 UTC-2%100K
23:00 UTC-1%90K
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: Monday.
SunMonTueWedThuFriSat
Above the authors' own mediansBelowScale: plus or minus 111%Busiest day: Monday
Show engagement by day of week as a table
Engagement by day of week
DayVs author medianPosts
Sunday+5%393K
Monday+1%483K
Tuesday-2%520K
Wednesday-3%472K
Thursday-2%430K
Friday-3%447K
Saturday+2%393K
See what moves engagement across the whole catalogWhat counts as a good engagement rate at this size

Formats this account uses

Its own posting mix on the left, and what each of those formats does across every account we track on the right. Only formats where the effect clears our publish test appear here, so an empty row is a format we could not measure rather than one that does nothing.

This account's posting mix compared with catalog-wide effects
FormatThis accountCatalog effect95% intervalAccounts behind it
Image or video0% of posts+111%+108% to +115%34K
Outbound link100% of posts-41%-42% to -40%32K
Typical length-no effect-2% to -1%42K
  • 0% of this account's sampled posts carry an image or video. Across the catalog, posts with an image or video run 111% above the same accounts' other posts.
  • 100% of its posts carry a link off X. Across the catalog, posts with an outbound link run 41% below the same accounts' other posts, so a large share of this account's output sits in the weakest bucket we measure.
  • Its average post runs 201 characters, which falls in the 180 - 280 characters band. Across the catalog, posts of 180 to 280 characters match the same accounts' other posts almost exactly.

These are catalog-wide differences applied to this account's own posting mix, not a measurement of how each format performs for this account specifically. We keep one median per account, not one per format per account, so the second thing is not something this data can tell you.

Best tweets

  • Sep 21, 202622x their median

    Evidence is growing that shingles vaccination may do more than just help prevent painful shingles outbreaks, including lowering risk of dementia and slowing biological aging. Now, a study suggests that the current version of the vaccine may also protect the heart. #HarvardHealth https://t.co/2vmgRjt2o5

    8633062925100K viewsView on X
  • Sep 22, 202615x their median

    Use of estrogen-only hormone therapy by menopausal women may significantly lower their odds of developing Alzheimer’s-related brain changes or being diagnosed with dementia, according to a study published Sept. 8, 2026, in Neurology. #HarvardHealth https://t.co/A8B3rq8KLz

    635170111075K viewsView on X
  • Jul 27, 202611x their median

    Here’s some good news if you’re a fast walker — and an incentive to pick up the pace if you’re not: findings from a study published July 14, 2026, in Neurology suggest that older adults who maintain a brisk natural walking pace into their 80s and beyond may be protecting their brains. #HarvardHealth https://t.co/AxLmq4O4B6

    433146252170K viewsView on X
  • Oct 1, 20268.2x their median

    Continuous positive airway pressure (CPAP) is the best-known treatment for sleep apnea, a disorder that raises the risk of high blood pressure and other health problems. A new study suggests that using a mandibular advancement device (MAD) is just as effective as CPAP for reducing blood pressure in people with sleep apnea at risk for cardiovascular disease. #HarvardHealth https://t.co/nGb8RTcCrX

    3379018451K viewsView on X
  • Mar 30, 20266.7x their median

    If you're a regular drinker of coffee or tea, you might rely on that morning cup to think more clearly through the day. A new study suggests your daily habit might help your brain in the long term, too. #HarvardHealth https://t.co/C32DYjq3Jm

    297105111418K viewsView on X
  • Oct 5, 20265.7x their median

    Walking is an easy, accessible way to meet your exercise goals. To reap longevity benefits from a daily walk, you can walk either farther or faster, a new study suggests. #HarvardHealth https://t.co/NkN07LYLiK

    20483111526K viewsView on X
  • Aug 11, 20262.5x their median

    Treatment might become more easily accessible, but it isn't right for everyone. #HarvardHealth https://t.co/md00b7aWsC

    317529017K viewsView on X
  • Apr 14, 20262.0x their median

    Maintaining good bone health, posture, and ergonomics can help. #HarvardHealth https://t.co/BLw98zCFOd

    912611318K viewsView on X
  • Sep 21, 20262.3x their median

    Some 3.5 million American men live with prostate cancer, often for many years. A new study suggests that changing the fats they eat might make a significant difference in the health and number of those years. #HarvardHealth #HealthyFat https://t.co/WlzGjYoHHd

    843010118K viewsView on X
  • Jul 24, 20261.6x their median

    Peptides are getting a lot of attention on social media, purporting to support everything from muscle growth and skin health to improved energy, cognitive function, and sleep quality. With all of the buzz, you may be wondering what these compounds are, what benefits they actually offer, and whether they’re safe. https://t.co/Axj6o6HBLe

    532410017K 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

#harvardhealth

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 55 interactions against 2.4M followers, an engagement rate of 0.002%. Posts are seen about 16K times each, and 0.349% of those impressions turn into an interaction. That is about 0.665% of the follower count, which is the gap between an audience on paper and an audience in a timeline. Posting runs at about 0.2 posts a day over the last 30 days, though only 20% of days saw any activity at all. Most posts go out around 14:00 UTC, and Monday is the busiest day of the week. Of the 6 posts sampled, 100% link out. The account's strongest tracked post pulled 1.2K interactions, about 22x its own typical post. Only 6 original posts have been captured so far, fewer than the 8 posts we want behind a median before treating it as settled. Read the figures above as an early measurement of this account, not as a finished profile of it.

What is Harvard Health's engagement rate on X?
Harvard Health (@HarvardHealth) has an engagement rate of 0.002%, based on the median interactions across 6 original posts from the last 30 days against 2,371,203 followers. Replies, reposts and quote-posts of other people are excluded from that sample.
Is that a good engagement rate?
At 0.002%, Harvard Health sits below the 10th percentile of the 204,491 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 @HarvardHealth have real engagement?
There is not yet enough sample to rank this account against others of its size.
When does @HarvardHealth post?
Most posts go out around 14:00 UTC, and Monday is its busiest day, at roughly 0.2 posts per day across the measured window.

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