The objective of this study was to estimate organ system–specific frequency and evolution of PASC.

The authors of this study aimed to estimate the frequency of COVID-19 hospitalisation or death in people who received at least one vaccine dose and characterise these individuals.

In this retrospective cohort study the authors aimed to evaluate overall and variant-specific effectiveness of BNT162b2 against SARS-CoV-2 infections and COVID-19-related hospital admissions by time since vaccination among members of a large US healthcare system.

This study included prospective data from a large mental healthcare provider in London, UK, with deaths from 2019 to 2020, used to assess age and gender-standardised mortality ratios (SMRs) across nine psychiatric conditions and by ethnicity.

In this study, the authors aimed to quantify the impact of the COVID-19 pandemic on the prevalence and burden of major depressive disorder and anxiety disorders globally in 2020.

In this retrospective surveillance study, the authors provide estimates of the number of SARS-CoV-2 infections and COVID-19-related admissions to hospital (ie, hospitalisations) and deaths averted by the nationwide vaccination campaign.

In this article the authors retrospectively reviewed data obtained from December 20, 2020, to May 31, 2021, regarding all cases of myocarditis and categorized the information using the Brighton Collaboration definition.

In this article the authors searched the database of Clalit Health Services, the largest health care organization (HCO) in Israel, for diagnoses of myocarditis in patients who had received at least one dose of the BNT162b2 mRNA vaccine (Pfizer–BioNTech).

Study of data from the Israeli Ministry of Health database regarding 1,137,804 persons who were 60 years of age or older and had been fully vaccinated at least 5 months earlier.

The authors investigated the safety, vaccine efficacy, and immunogenicity of two doses of AZD1222 as compared with placebo in preventing the onset of symptomatic and severe COVID-19 15 days or more after the second dose in adults.

In this article the authors used a matched test-negative, case–control study design to estimate vaccine effectiveness against any SARS-CoV-2 infection and against any severe, critical, or fatal case of COVID-19, from January 1 to September 5, 2021.

In this article the authors conducted a 6-month longitudinal prospective study involving vaccinated health care workers who were tested monthly for the presence of anti-spike IgG and neutralizing antibodies.

Our research paper of the month is a retrospective cohort study, aiming to investigate the association between field position, professional career length and playing era and increased risk of neurodegenerative disease among male former professional soccer players.

The aim of this study was to describe neurological and psychiatric complications of infection with SARS CoV 2 in children and adolescents and determine the prevalence of such manifestations in hospitalised patients under 18 years-old.

This patient-led online research study enrolled 3762 participants with confirmed or suspected COVID-19, 93.2% of whom were experiencing symptoms after 28 days, referred as ‘Long COVID’.