Medical Health Clúster A.C.


Covid-19 Vaccination during Pregnancy — Two for the Price of One

The benefits of maternal vaccination to the infant through maternal antibody transfer across the placenta have long been recognized. In the 1870s, babies born to mothers who had received smallpox vaccination were unlikely to have smallpox early in life.1 Tetanus toxoid vaccination during pregnancy, along with improved hygiene during delivery, has […]

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Cardiac Complications More Common After COVID-19 Than Vaccination

The risk of developing myocarditis and other inflammatory heart conditions after COVID-19 vaccination is substantially lower than it is after SARS-CoV-2 infection, according to an analysis of electronic health records from 40 US health systems. Although it’s a rare complication, myocarditis has been associated with both SARS-CoV-2 infection and messenger RNA (mRNA)–based […]

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Cardiac Issues After COVID Infection and Vaccination: New Data

New data from two different sources on cardiac complications linked to COVID-19 have shown that such issues are low overall, but are higher after infection than after vaccination. The new information comes from the Centers for Disease Control and Prevention’s (CDC’s) National Patient-Centered Clinical Research Network (PCORnet), and from a separate […]

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Effectiveness of COVID-19 mRNA Vaccination in Preventing COVID-19–Associated Hospitalization Among Adults with Previous SARS-CoV-2 Infection — United States, June 2021–February 2022

Summary What is already known about this topic? Persons with previous SARS-CoV-2 infection have some protection against reinfection leading to hospitalization, but there is limited evidence regarding the additional benefit of vaccination among these persons. What is added by this report? Among persons with previous infection, COVID-19 mRNA vaccination provided […]

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Timing of COVID-19 Vaccination Crucial for Blood Cancer Patients

The timing of treatment in relation to vaccination is the strongest predictor of COVID-19 vaccine antibody response say the researchers of a new study. For their study, published in Nature Cancer, researchers from the University of Southampton led a UK multicentre prospective observational study (PROSECO) evaluating COVID-19 vaccine responses in individuals with […]

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No Increased Risk of Rare Neurological Events After COVID Vaccination

A new study finds no increased risk of rare neurological events after COVID-19 vaccination, but does find an increased risk of these events after SARS-CoV-2 infection. The European Medicines Agency (EMA) listed Guillain-Barré syndrome as a rare side effect of the Oxford-AstraZeneca and Pfizer-BioNTech COVID vaccines following reports that some […]

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Vaccination Status in School Children and Risk for COVID-19

A real-world, prospective study in a secondary school system showed risk for symptomatic infection to be 9 times higher in unvaccinated children. Recent surveys suggest that many parents are reluctant to permit SARS-CoV-2 vaccination for their school-aged children. In this study, researchers in North Carolina used a private secondary school […]

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Disparities in COVID-19 Vaccination Coverage Between Urban and Rural Counties — United States, December 14, 2020–January 31, 2022

Summary What is already known about this topic? COVID-19 incidence and mortality are higher in rural than in urban communities. Disparities in COVID-19 vaccination coverage between urban and rural communities have been recognized. What is added by this report? COVID-19 vaccination coverage with the first dose of the primary vaccination […]

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