Harvard T.H. Chan School of Public Health

Harvard T.H. Chan School of Public Health

@HarvardChanSPH

Powerful ideas for a healthier world. This is the official account for #HarvardChan.

Boston, MA http://hsph.harvard.edu Joined 2009-05-26 Date of Analysis: Dec 16, 2025

379,795

Followers

2,676

Following

33,437

Tweets

28.7

Avg Engagement

4,233

Listed

No

Verified

Account Overview

What This Report Covers

This comprehensive analysis examines @HarvardChanSPH's Twitter/X presence across multiple dimensions. We analyze tweet content, engagement patterns, audience demographics, posting habits, and network connections to provide actionable insights about this account's social media strategy and influence.

Account Classification

  • Account Size: Macro Influencer (100K+)
  • Account Age:2009-05-26
  • Verification:No
  • Location:Boston, MA

Data Summary

  • Tweets Analyzed:3,239
  • Avg Likes per Tweet:15.7
  • Avg Retweets per Tweet:13.0
  • Followers Analyzed:50,000

Engagement Analysis

Based on 3,239 tweets

The account maintains a steady average engagement with likes and retweets, indicating consistent interaction. Verified accounts make up a small percentage, suggesting a mix of personal and institutional followers.

15.7

Avg Likes/Tweet

13.0

Avg Retweets/Tweet

50,899

Total Likes

42,073

Total Retweets

Engagement Quality Analysis

Median-based metrics that resist fake virality and outliers.

8

Median Likes

6

Median Retweets

26

75th Percentile

2,428

Top Tweet

0.08

Engagement per 1K Followers

Normalized influence metric

Viral Spikes

Engagement Pattern

Few posts get most engagement

Posting Behavior

Content style and format preferences

Mixed

Balanced content approach

64.6%

Original

4.5%

Replies

26.5%

Retweets

4.4%

Quotes

0.0%

Threads

0.4%

With Media

74.0%

With Links

37.2%

With #Tags

76.3%

With @Mentions

1.8%

With Emojis

207

Avg Length

Audience Reaction Profile

Broadcast

Focuses on original content over replies

0.07

Reply/Original Ratio

0.17

Quote/RT Ratio

Posting Rhythm

Highly Bursty

Posts in concentrated bursts

90.2%

Weekday Posts

9.8%

Weekend Posts

Top Hashtags

#covid19 (214) #harvardchanstudio (81) #coronavirus (50) #pandemic (47) #harvardchan21 (35) #publichealth (30) #onthebrink (30) #fauciatharvard (29) #notalone (26) #phstorytellers (26)

Most Mentioned

@harvardchansph (278) @harvardchandean (257) @harvardcchange (119) @harvard (113) @billhanage (108) @j_g_allen (95) @forumhsph (92) @michaelmina_lab (79) @fxbharvard (65) @mlipsitch (61)

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Content Strategy Analysis

Based on 3,239 tweets

Content Type Distribution

Content Breakdown

Original Tweets 2,094 (65%)
Replies 146 (5%)
Retweets 857 (26%)
Quote Tweets 142 (4%)

What This Reveals About Their Strategy

This is a content-creator focused account that primarily shares original thoughts, ideas, and media. With original content dominating their feed, they position themselves as a source of new information rather than a curator. This strategy works well for establishing thought leadership.

The 857 retweets (26% of activity) show they also amplify content from others, which helps build relationships with other accounts and provides value to followers by surfacing relevant content.

Posting Patterns & Optimal Timing

Based on 3,239 tweets

Engagement by Hour (UTC)

Posting Frequency Over Time

Timing Insights

Understanding when an account posts and when their audience is most responsive provides valuable competitive intelligence. The charts above show when this account's content receives the most engagement, which often correlates with when their specific audience is most active on the platform.

Peak posting times vary significantly based on an account's audience demographics, timezone distribution, and content type. Accounts with global audiences often see engagement spread across multiple time windows, while those with regional focus may have more concentrated peaks.

Audience Demographics

Based on 50,000 followers

The primary audience includes students, researchers, and professionals in public health and related fields. It also engages with the general public interested in health and science topics.

Average

Audience Quality

25.7%

Suspicion Index

27.3%

Low-Quality %

35

Median Reach

Audience Quality Signals

Lower percentages indicate healthier, more authentic followers.

32.2%

Empty Bio

32.3%

<10 Tweets

15.0%

Mass Following (>2K)

0.0%

New (<90 days)

52.7%

Low Ratio (<0.1)

0.0%

New (<180 days)

81.1%

No URL

22.4%

<3 Tweets

Free Mode Analysis: These quality metrics use heuristic signals (empty bios, low tweets, suspicious ratios). For ML-powered bot detection with 95%+ accuracy, use our dedicated tool.

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Follower Reach & Influence

This account's followers have their own audiences, creating potential for secondary amplification.

66,430,583

Total Potential Reach

35

Median Follower Reach

186

75th Percentile Reach

7.0%

>1K followers

1.0%

>10K followers

0.2%

>50K followers

0.1%

>100K followers

Creator vs Consumer Split

Classification based on tweet activity: Creators (>100 tweets), Consumers (10-100 tweets), Dormant (<10 tweets).

45.1%

Creators

22,575 accounts

22.6%

Consumers

11,282 accounts

32.3%

Dormant

16,143 accounts

724

Verified Followers

1.45% of total

12.8%

Professional Bios

founder, dev, analyst, etc.

0.09

Median Follow Ratio

follower/following

Follower Influence Distribution

How many followers do their followers have?

Follower Account Age

How long have followers been on Twitter?

Geographic Distribution

Top locations where followers are based (from those who share location data):

Boston, MA (725) United States (433) Washington, DC (248) India (247) New York, NY (224) London, England (202) New Delhi, India (168) Los Angeles, CA (149) Chicago, IL (141) New York, USA (141)

1,282

Verified Followers

1.28% of total

13,037

Protected Accounts

13.04% of total

6 years

Avg Account Age

of their followers

Notable Followers (By Influence)

Top accounts following this user, sorted by their follower count:

Username Followers Profession Interests
@JohnCena 14,103,712 Wrestler Wrestling, Motivation, Self-promotion
@El_Universal_Mx 7,344,448 News outlet news, Mexico, journalism
@hrw 5,085,994 Human Rights Human Rights, Abuses, Advocacy
@DrOz 3,869,353 Cardiologist Health, Wellness, Nutrition
@ChelseaClinton 2,839,339 Advocate Advocate, Author, Teacher
@ariannahuff 2,742,335 Entrepreneur Mother, Sister, Founder
@DrTedros 1,945,120 Doctor Health, Global, Leadership
@miguelhotero 1,929,161 Journalist Politics, Journalism, Leadership
@LeonKrauze 1,584,451 Journalist TV, Journalism, Podcasts
@SinghLions 1,334,756 Restaurateur Food, Travel, Influencer

Top Keywords in Follower Bios

health (10,234) student (3,492) public (3,190) research (3,029) phd (2,737) medical (2,596) views (2,014) life (1,969) university (1,889) medicine (1,859)

Top Hashtags in Follower Bios

#publichealth (212) #medtwitter (173) #health (158) #healthequity (155) #meded (129) #mentalhealth (117) #blm (113) #globalhealth (111) #healthcare (94) #ai (90)

67,441

Followers With Bio

32,559

Followers Without Bio

67.44%

% With Bio

32.56%

% Without Bio

Why Audience Demographics Matter

Understanding who follows an account reveals the type of influence they hold. Accounts followed primarily by users with few followers indicate broad, mainstream appeal. Those with many high-follower followers have greater potential for content amplification through secondary sharing.

Account age distribution also tells a story: a follower base with many new accounts might indicate recent viral growth, while established followers suggest long-term, stable influence. Geographic data helps understand the cultural context and timezone spread of the audience.

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Viral Tweets

Top 5 by likes+RTs from 3,239 analyzed

9,883

Combined Engagement

3,964

Total Likes

5,919

Total Retweets

1,977

Avg per Tweet

Key Metrics for Viral Tweets

0%

With Media

40%

With Hashtags

100%

With @Mentions

60%

With Links

Topical Analysis:

Public Health Education Research Global Health Science Communication Academic Collaboration

Key Insights & Takeaways

The account frequently highlights academic appointments and collaborations, showcasing its focus on education and research. It shares stories of public health leaders, emphasizing real-world impact and global health challenges. Engagement is driven by informative and thought-provoking content that sparks discussion and awareness.

Strengths

  • + Established follower base of 379,795
  • + Strong original content creation
  • + Active presence with consistent posting

Opportunities

  • ~ Optimize posting times for peak engagement windows
  • ~ Analyze top-performing content for replicable patterns
  • ~ Leverage geographic concentration for targeted content
  • ~ Explore collaboration potential with followed accounts

Summary

This analysis of @HarvardChanSPH reveals an growing Twitter presence with 379,795 followers. The account demonstrates a content-creator strategy, averaging 28.7 engagements per tweet. Key strengths include consistent posting and an engaged audience, with opportunities to further optimize timing and content strategy based on the patterns identified in this report.

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About This Analysis: This analysis is based on a snapshot of followers, following, and recent tweets. It evaluates structure, quality, and behavior, not historical growth. Metrics like growth rate, momentum, churn, or spike analysis require time-series data which is not available from a single snapshot.

Data collected and analyzed by twtData | Analysis date: Dec 16, 2025