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Nathan Lo Profile picture
Nathan Lo
@NathanLo3579
@Stanford physician-scientist | Infectious diseases, epidemiology, modeling, and public health | Views mine | Lo Lab: https://t.co/iaZAmq2Xdb
Mar 6 • 11 tweets • 3 min read
🧵 1/N How often should I get a #COVID19 booster vaccine? Our new article published in @NatureComms estimates benefit of different frequencies of COVID vaccines against severe disease by risk group (age, immunocompromised status). Check it out here! nature.com/articles/s4146…
Image 2/N Our main analysis uses a microsimulation model to compare one-time, annual, and semiannual (every 6 month) booster vaccines by age group and immunocompromised status, calibrated to epidemiologic data from approximately September 2022. Image
Jan 2, 2023 • 15 tweets • 18 min read
🧵1/N How do vaccines and/or natural infection change infectiousness of #COVID19 during #Omicron? Our new article published in @NatureMedicine measures #COVID19 infectiousness, and finds reductions from both vaccine and natural infection. nature.com/articles/s4159… 2/N We use detailed epidemiologic data from SARS-CoV-2 surveillance within the California prison system to study #COVID19 transmission. Our goal was to translate these findings into policy to improve health for this vulnerable incarcerated population that remains at high risk.
Mar 22, 2021 • 14 tweets • 19 min read
1/N Our new study published in @TheLancetInfDis on #COVID19 testing strategies for safer airline travel. Getting tested before and after air travel can prevent the spread of #COVID19 and make flying safer. Collab led by the singular Dr. @mathewkiang. thelancet.com/journals/lanin… 2/N What is the best #COVID19 testing strategy when traveling? We find pre-travel testing (PCR 3 days before travel or rapid antigen test on travel day) reduces risk of being infectious on airplane by ~88%, but post-travel quarantine/testing needed to reduce risk of importation.
Dec 11, 2020 • 12 tweets • 15 min read
1/N *Our new pre-print study now posted* What is the best #COVID19 testing strategy when traveling? We find pre-travel testing reduces risk of being infectious on airplane by ~87%, but post-travel quarantine/testing needed to reduce risk of importation. medrxiv.org/content/10.110… 2/N With the holidays, travel is likely to skyrocket. Our analysis finds that no testing strategy can eliminate risk of infection during travel or risk of bringing infection to a new place. Therefore, traveling should only be done when essential, esp given number of #COVID cases!