A study in Qatar assessed the effectiveness of previous infection, vaccination, and both against symptomatic SARS-CoV-2 caused by omicron BA.1 and BA.2 and against severe, critical, or fatal Covid-19.

In a recent case of xeno­trans­plan­ta­tion, now described in the Journal, a porcine heart was transplanted into a human patient, an advance made possible through genetic alterations in the animal donor.

In a small study involving 54 participants, omicron subvariants BA.2.12.1, BA.4, and BA.5 of SARS-CoV-2 were more likely to escape neutralizing antibodies induced by both vaccination and previous infection than were the prior omicron subvariants BA.1 and BA.2.

The proliferation of vaccine misinformation and its use for political purposes are placing a large number of people at risk in the Covid-19 pandemic and allowing the pandemic to continue.

A previously healthy 18-year-old woman presented to a primary care provider with a 2-month history of headaches and midscapular pain. The midscapular pain was worse at night and lessened with exercise. What is the diagnosis?

What does it mean for a physician who has long maintained her privileged back channels to finally acquiesce to entering her own electronic medical record — and interacting with her doctors — through the patient portal?

A 17-year-old girl presented during the Covid-19 pandemic with prolonged fever, cough that had progressed to hemoptysis, fatigue, pleuritic pain, and dyspnea. What is the diagnosis? Vote and comment. Find the answers in the full text of the case, to be published on July 13.