The Omicron variant of the coronavirus does not have a negative effect on cardiovascular health in young adults who have been vaccinated, a small study suggests. Additionally, women should not delay routine mammograms after receiving a COVID-19 mRNA vaccine, experts now say.

Although people who recover from COVID-19 usually gain some immune defenses against reinfection, they get additional protection from vaccines, especially against severe disease, according to two studies published on March 31 in The Lancet Infectious Diseases. Additionally, two gold-standard trials published in The New England Journal of Medicine on March 30 help settle questions about two controversial therapies touted by many early in the pandemic with decidedly mixed results – failure for the antiparasite drug ivermectin and success for antibody-rich blood plasma from COVID-19 survivors.

Johnson & Johnson said the company’s Ebola vaccine regimen demonstrated antibody immune responses in adults and children, citing data published in the Lancet Infectious Diseases journal.

A study published in The Lancet Infectious Diseases found that the Pfizer-BioNTech, Oxford-AstraZeneca or Moderna vaccines resulted in a drop in “long-haul” Covid-19 by 50 percent. According to data collected by the American Academy of Pediatrics (AAP), more than 500,000 children tested positive in the United States for Covid-19 from August 5 to August 26.

A new study by researchers at the University College London (UCL) published in Lancet Infectious Diseases finds that although the U.K. variant of SARS-CoV-2 known as B.1.1.7 is more transmissible than the wild-type, original Wuhan strain, it is likely not more deadly.

As the mortality figures for COVID-19 continued to rise, people are wondering where they will stop. The actual death toll for COVID-19 will not be calculable for some time, but there are early indications that the mortality rate may be significantly lower than calculations of deaths per confirmed cases lead one to believe.

A key modeling study from Singapore has found that putting multiple social lockdowns in place – including school closures – will have the biggest impact on curbing COVID-19, the pandemic disease caused by the new coronavirus.

The U.S. Centers for Disease Control and Prevention (CDC) published research in the journal Lancet Infectious Diseases outlining the results from two experimental Ebola drugs, Gilead Sciences’ remdesivir and Mapp Biopharmaceutical’s ZMapp.