Antibody levels fell to low or near zero within the first few months of getting the vaccine, unless the person had previously received a smallpox vaccine, scientists reported Saturday at the European Congress of Clinical Microbiology and Infectious Diseases in Barcelona.
People vaccinated before their first case of COVID-19 are diagnosed with Long COVID almost four times less than unvaccinated people, suggests a large new study published Nov. 22 in the BMJ.
Hospital-acquired (nosocomial) COVID-19 transmission was associated with higher rates of 30-day mortality and more severe disease during the early phases of the pandemic, but the risk has lessened in the post-Omicron landscape, according to a new study from JAMA Network Open based on outcomes seen in Sweden during the past 3 years.
Personal motivations color people's memories of the COVID-19 pandemic, biasing their assessment of past political actions and complicating emergency-preparedness planning, suggests an analysis of four empirical studies.
Two more lab groups—one from Sweden's Karolinska Institute and the other from Harvard University—have reported results of antibody neutralization lab experiments, which suggest vaccination or previous infection offer some protection against the highly mutated BA.2.86 SARS-CoV-2 variant.
