As of January 7, 2022, the NCRC will no longer be updating our website with new reviews each week although, on occasion, we may still review and upload summaries for key papers. Please feel free to reach out to us at NCRC@jhu.edu with any inquiries.

2019 Novel Coronavirus Research Compendium (NCRC)

Our teams rapidly curate and assess emerging research on SARS-CoV-2 and COVID-19. We prioritize original, high-quality research for public health action and papers receiving significant attention, regardless of quality. Click here to sign up for our weekly update.

Reviews of recent papers

Increased risk of SARS-CoV-2 reinfection associated with emergence of the Omicron variant in South Africa

2 Dec 2021 — medRxiv, Pulliam et al.

This retrospective study, available as a preprint and thus not yet peer-reviewed, assessed whether the emergence of the Omicron SARS-CoV-2 variant of concern was associated with an increased risk of reinfection using data for all positive test results in South…

Prevention of SARS-CoV-2 transmission during a large, live, indoor gathering (SPRING): a non-inferiority, randomised, controlled trial

26 Nov 2021 — The Lancet Infectious diseases, Delaugerre et al.

Despite the urgent need for interventions to lower risks of SARS-CoV-2 transmission at public events, there has been surprisingly little evidence from randomized trials. This RCT took place at a large indoor concert in Paris, France in May of 2021,…

Risk for Stillbirth Among Women With and Without COVID-19 at Delivery Hospitalization – United States, March 2020-September 2021

26 Nov 2021 — Morbidity and Mortality Weekly Report, DeSisto et al.

This study of more than 1.2 million deliveries from 736 hospitals across the US from March 2020-September 2021 found a significantly elevated risk of stillbirth associated with maternal COVID-19 diagnosis. The risk of stillbirth was 1.9 times higher among deliveries…

Transmission potential of vaccinated and unvaccinated persons infected with the SARS-CoV-2 Delta variant in a federal prison, July—August 2021

19 Nov 2021 — MedRxiv, Salvatore et al.

The study, available as a preprint and thus not yet peer reviewed, compared viral shedding among 78 vaccinated people and 15 unvaccinated people infected with the Delta variant of SARS-CoV-2 incarcerated at a Texas prison in July and August 2021.…

Effect of COVID-19 vaccination on menstrual periods in a retrospectively recruited cohort

15 Nov 2021 — medRxiv, Male et al.

This preprint, which has yet to undergo peer-review, examined changes in menstrual period timing and flow after COVID-19 vaccination in 1,273 adults in the United Kingdom. About half of the surveyed individuals reported changes in period timing (earlier or later…

Evaluation of the BNT162b2 Covid-19 Vaccine in Children 5 to 11 Years of Age

9 Nov 2021 — The New England Journal of Medicine, Walter et al.

A two-dose regimen of the Pfizer vaccine (10 ug per dose, one third of the dose approved for individuals older than 11 years) was recently approved for emergency use in children aged 5-11 years in the United States. This study…