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Joseph Allen
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Joseph Allen
@j_g_allen
Prof at Harvard; Exposure and Risk Science; Direct Harvard #HealthyBuildings Program; Coauthor of HEALTHY BUILDINGS w/ HBS Prof Macomber
Boston
linktr.ee/healthybuildin…
Joined October 2011
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  • Pinned
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    Joseph Allen
    @j_g_allen
    Mar 7, 2022
    “There’s going to be a fundamental rebalancing in terms of how we think about indoor spaces," Allen says. "I think people won’t tolerate sick buildings. That era is over. Rightly so, and good riddance.” #HealthyBuildings
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    This scientist says cleaning indoor air could make us healthier—and smarter
    From science.org
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    Joseph Allen
    @j_g_allen
    Apr 3, 2025
    Now economists know how scientists felt when he said “inject bleach”
    2.4M
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    Joseph Allen
    @j_g_allen
    Apr 19, 2025
    --> WH sends Harvard letter making outrageous (and illegal) demands --> WH now says it was sent by accident (oops!) --> WH blames Harvard (?) for reacting to the letter they sent --> Harvard: The letter “was signed by three federal officials, placed on official letterhead,
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    1.1M
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    Joseph Allen
    @j_g_allen
    Dec 29, 2021
    I see a lot of people - on both "sides" - making simple mistakes about masks. I've studied PPE, taught PPE, and overseen PPE programs, including teams implementing fit testing in hospitals, long before covid. A thread
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    Joseph Allen
    @j_g_allen
    Jul 18, 2022
    Sorcery
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    TG ☕️
    00:00
    user avatar
    TG ☕️
  • user avatar
    Joseph Allen
    @j_g_allen
    Sep 2, 2025
    This is corrupt
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    516K
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    Joseph Allen
    @j_g_allen
    Jun 3, 2025
    Harvard researcher Dr Sarah Fortune was only two years away from creating a vaccine that could have saved the 1.25 million people killed each year by tuberculosis. But last month, she received a letter telling her that the $60 million grant funding her research was being halted
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    1.6M
  • user avatar
    Joseph Allen
    @j_g_allen
    Oct 31, 2024
    This is big - WSJ Editorial Board endorses Kamala Harris!!!!
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    374K
  • user avatar
    Joseph Allen
    @j_g_allen
    Jul 8, 2025
    RFK: “microplastics are bad” (cites recent study from OSU) EPA: on same day, cancels that research grant on microplastics to OSU #MAHA
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    Trump administration actions contradict MAHA rhetoric on toxic chemicals
    From npr.org
    170K
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    Joseph Allen
    @j_g_allen
    Apr 19, 2025
    Fixed it: --> last year, the U.S. sold more educational services to the rest of the world than it sold in natural gas and coal **combined** --> every $1 of research funded by NIH generates $2.56 in economic activity --> more than 1.1M foreign students come to the U.S. each year
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    350K
  • user avatar
    Joseph Allen
    @j_g_allen
    May 7, 2021
    I cannot believe this headline is from May 7, 2021.
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    Joseph Allen
    @j_g_allen
    Dec 29, 2021
    Replying to @j_g_allen
    3. Cloth masks work, just not as well as high filtration masks --> a 50% effective mask reduces inhaled dose by...50% --> when two people where this level mask, the combined efficacy is 75% It's wrong to say these "don't work"; correct to say they are "less effective" than N95
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    Joseph Allen
    @j_g_allen
    May 4, 2025
    Hmmm, looks like DOGE cut vital services and medical research across American but helped create a $1B slush-fund for SpaceX...
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    174K
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    Joseph Allen
    @j_g_allen
    Dec 29, 2021
    Replying to @j_g_allen
    1. Masks work It's basic physics.
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    Masks Work. Really. We’ll Show You How (Published 2020)
    From nytimes.com