Miguel Hernán

@_MiguelHernan · Boston · joined 20 Aug 2015

Using health data to learn what works. Making #causalinference less casual. Director @CAUSALab | Professor @HarvardChanSPH | Methods Editor @AnnalsofIM

41 271Followers

180Following

1 094Posts total

126.6KViews on collected posts

Derniers posts

Miguel Hernán@_MiguelHernan19 Dec 2025

This is getting increasingly harder to understand, @RobertKennedyJr . In the America First era, when a U.S. federal agency wants to do a randomized trial, it sends $1.6 million to Denmark? I don't run trials, but so many excellent U.S. researchers do. Aren't they good enough? 9.7K views · 19 likes · 2 reposts · 1 replies Open on X →

Miguel Hernán@_MiguelHernan19 Dec 2025

Public health scientists are raising concerns following news of a $1.6 million award from the U.S. Centers for Disease Control and Prevention for a trial of hepatitis B vaccines in newborn babies in the West African nation of Guinea-Bissau. https://t.co/HwZvj0G9Sd 12.9K views · 9 likes · 6 reposts · 0 replies Open on X →

Miguel Hernán@_MiguelHernan4 Sep 2025

I have a question for @RobertKennedyJr. You want to Make America Healthy Again. Exactly which year you’d like to go back to? 2007, 1992, 1983, 1976…? It’s hard to evaluate your policies without this piece of information. (Ok if a member of your staff replies) 7.4K views · 45 likes · 9 reposts · 2 replies Open on X →

Miguel Hernán@_MiguelHernan9 Mar 2025

Anyone interested in science in the U.S. should read this. https://t.co/WOx1lsQw2o 5K views · 46 likes · 12 reposts · 1 replies Open on X →

Miguel Hernán@_MiguelHernan2 Feb 2025

All CDC datasets have been anonymously uploaded here; https://t.co/EwH68Op366 Thanks to whoever made it possible that taxpayers can access the resources that were paid for by their taxes. 6.5K views · 61 likes · 14 reposts · 1 replies Open on X →

Miguel Hernán@_MiguelHernan1 Feb 2025

@_MiguelHernan @CDCgov This type of censorship is the beginning of a dictatorship regimen. Wake up people!! 674 views · 2 likes · 0 reposts · 0 replies Open on X →

Miguel Hernán@_MiguelHernan31 Jan 2025

The CDC's page for HIV data has vanished. Who benefits from this? In what universe does this help the country? https://t.co/ulkvStjBbl https://t.co/4jLJ3JrzZE

16.3K views · 160 likes · 41 reposts · 3 replies Open on X →

Miguel Hernán@_MiguelHernan23 Dec 2024

@_MiguelHernan its a good book 475 views · 1 likes · 0 reposts · 0 replies Open on X →

Miguel Hernán@_MiguelHernan23 Dec 2024

@_MiguelHernan Thanks a lot for writing it and making it available. Any idea when the printed version will be available? I am one of those who are more likely to read something when it's a physical book... 490 views · 3 likes · 0 reposts · 0 replies Open on X →

Miguel Hernán@_MiguelHernan23 Dec 2024

@_MiguelHernan Thank you for sharing! This is a gift for xmas :) 542 views · 2 likes · 0 reposts · 0 replies Open on X →

Miguel Hernán@_MiguelHernan23 Dec 2024

Upgrade your #causalinference arsenal. A revision of our book "Causal Inference: What If" is available at https://t.co/3rrh0l8nFu Thanks to everyone who suggested improvements, reported typos, and proposed new citations and material. Enjoy the #WhatIfBook. Also, it's free. ht

66.6K views · 886 likes · 243 reposts · 14 replies Open on X →

Growth & engagement

How the posts we collected actually performed: views and reaction rate post by post, what the audience did with them, and where the follower count goes.

Views per post

66.6K23 Dec

542

490

475

16.3K31 Jan

6741 Feb

6.5K2 Feb

5K9 Mar

7.4K4 Sep

12.9K19 Dec

9.7K

Last 11 collected posts, oldest on the left. The scale is logarithmic: one post can outrun the rest a hundred times over.

Engagement rate per post

1.74%23 Dec

0.37%

0.61%

0.21%

1.27%31 Jan

0.30%1 Feb

1.20%2 Feb

1.18%9 Mar

0.78%4 Sep

0.14%19 Dec

0.23%

Reactions — likes, reposts, replies and quotes — divided by views.

What the audience does

Likes55.0%1 234 in total

Reposts14.6%327 in total

Replies1.0%22 in total

Quotes1.1%24 in total

Bookmarks28.4%638 in total

Share of every reaction we collected for this account. Replies mean argument, reposts mean endorsement, bookmarks mean the post was worth keeping.

The follower curve appears once this account has two daily snapshots — we take one a day, and this one is on its first.

Derniers posts

Growth & engagement

Views per post

Engagement rate per post

What the audience does

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