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Breakthrough Infections Rare Among Vaccinated Americans


19 Apr 2021

In the United States, the Centers for Disease Control and Prevention provided its first public data about breakthrough Covid-19 cases to CNN last week and it shows that vaccines have been highly effective at reducing infections, hospitalizations and death. As of last week, around 78.5 million Americans had been fully vaccinated and the CDC's data states that 5,800 cases of Covid-19 occurred among fully vaccinated people, 396 of whom required hospitalization with 74 deaths recorded.


U.S. Calls for Pause on Johnson & Johnson Vaccine After Clotting Cases


13 Apr 2021

The Food and Drug Administration and the Centers for Disease Control will stop using the vaccine at federal sites and urge states to do so as well while they examine the safety issues.


Likely Legal, ‘Vaccine Passports’ Emerge as the Next Coronavirus Divide


07 Apr 2021

Businesses and universities want fast, easy ways to see if students and customers are vaccinated, but conservative politicians have turned “vaccine passports” into a cultural flash point.


AZD1222 US Phase III trial met primary efficacy endpoint in preventing COVID-19 at interim analysis


23 Mar 2021

79% vaccine efficacy at preventing symptomatic COVID-19 100% efficacy against severe or critical disease and hospitalization Comparable efficacy result across ethnicity and age, with 80% efficacy in participants aged 65 years and over Favorable reactogenicity and overall safety profile


Experts Discuss COVID-19—Vaccine Questions, School Openings, and More


17 Mar 2021

JAMA Live Highlights features comments from livestream interviews by JAMA Network Editor in Chief Howard Bauchner, MD. His discussions with experts in clinical care, public health, and health policy focus on critical issues related to the COVID-19 pandemic. Comments have been edited for clarity.




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We are scheduling training with them this week on how to generate the report.


07 Jun 2021

The Centers for Disease Control and Prevention (CDC) recently issued guidance that fully vaccinated individuals can safely remove masks and end social distancing in most indoor settings.1 Educational facilities and businesses are faced with whether and how to differentiate between vaccinated and unvaccinated individuals, including requiring proof of vaccination. Mandatory vaccination has historically served as a tool to reach and sustain high immunization coverage and to prevent transmission in K-12 schools, colleges/universities, and health care facilities. Vaccine mandates could extend to workers and customers in businesses to ensure safer environments. This Viewpoint examines the epidemiologic, public health, and legal considerations for mandatory SARS-CoV-2 vaccinations in each setting.




Mix-and-match COVID vaccines trigger potent immune response


19 May 2021

Preliminary results from a trial of more than 600 people are the first to show the benefits of combining different vaccines.




Even Partial COVID-19 Vaccination Protects Nursing Home Residents


17 May 2021

A CDC analysis has shown that a single dose of the Pfizer-BioNTech COVID-19 vaccine protected medically vulnerable nursing home residents as well as it did general adult populations that were evaluated in other efficacy and effectiveness studies.




Delayed Localized Hypersensitivity Reactions to the Moderna COVID-19 Vaccine


12 May 2021

The Moderna COVID-19 vaccine may cause a delayed localized hypersensitivity reaction with a median latency to onset of 7 days after vaccine administration. This pruritic and variably tender reaction has a median duration of 5 days, but may persist for up to 21 days, and may occur again and sooner after the second vaccine dose; no serious adverse events were observed in association with this cutaneous reaction to the Moderna COVID-19 vaccine.




The epidemiological impact of the NHS COVID-19 App


12 May 2021

The COVID-19 pandemic has seen digital contact tracing emerge around the world to help prevent spread of the disease. A mobile phone app records proximity events between app users, and when a user tests positive for COVID-19, their recent contacts can be notified instantly. Theoretical evidence has supported this new public health intervention1-6, but its epidemiological impact has remained uncertain7. Here we investigated the impact of the NHS COVID-19 app for England and Wales, from its launch on 24 September 2020 through to the end of December 2020. It was used regularly by approximately 16.5 million users (28% of the total population), and sent approximately 1.7 million exposure notifications: 4.4 per index case consenting to contact tracing. We estimated that the fraction of app-notified individuals subsequently showing symptoms and testing positive (the secondary attack rate, SAR) was 6.0%, comparable to the SAR for manually traced close contacts. We estimated the number of cases averted by the app using two complementary approaches. Modelling based on the notifications and SAR gave 284,000 (108,000-450,000), and statistical comparison of matched neighbouring local authorities gave 594,000 (317,000-914,000). Roughly one case was averted for each case consenting to notification of their contacts. We estimated that for every percentage point increase in app users, the number of cases can be reduced by 0.8% (modelling) or 2.3% (statistical analysis). These findings provide evidence for continued development and deployment of such apps in populations that are awaiting full protection from vaccines.




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