Article de recherche Comment les enfants et adolescents avec le trouble déficit d'attention/hyperactivité (TDAH) vivent-ils le confinement durant la pandémie COVID-19 ?How do children and adolescents with Attention Deficit Hyperactivity Disorder (ADHD) experience lockdown during the COVID-19 outbreak?

Recent studies have suggested that, to reach immunity, immunocompetent SARS-CoV-2 seropositive adults may only require 1 dose rather than 2 doses of a messenger RNA vaccine 1,2 ; however, these studies did not include older adults. Older adults living in nursing homes are at higher risk for severe COVID-19, and the immune response to the vaccine may differ from that of younger, healthier adults.We compared IgG antibody levels after a single dose of BNT162b2 (Pfizer-BioNTech) vaccine in nursing home residents with or without prior COVID-19.Methods | Between March and June 2020, we studied residents from nursing homes in Montpellier, France, facing a COVID-19 outbreak. 3 As soon as a resident developed COVID-19, the testing recommendations from the European Geriatric Medicine Society were followed 4 in that all residents were repeatedly tested using reverse transcriptase-polymerase chain reaction (RT-PCR) on nasopharyngeal swabs until no new cases were diagnosed. Participants provided written informed consent and the study was approved by the Montpellier University hospital institutional review board.Six weeks after the end of the outbreak, all residents underwent blood testing for levels of IgG antibody against the SARS-CoV-2 nucleocapsid (N) protein. 3 All residents from 6 nursing homes were offered a first vaccine dose in January 2021. Three weeks later, all residents underwent blood testing to quantitatively assess IgG antibody levels against the SARS-CoV-2 spike (S) protein and N protein. Levels of IgG antibody against the SARS-CoV-2 receptor-binding domain were quantified using the SARS-CoV-2 IgG II Quant assay (Abbott Diagnostics). The results were expressed as arbitrary units (AU)

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Background The humoral immune response following COVID‐19 vaccination in nursing home residents is poorly known. A longitudinal study compared levels of IgG antibodies against the spike protein (S‐RBD IgG) (S‐RDB protein IgG) after one and two BNT162b2/Pfizer jabs in residents with and without prior COVID‐19. Methods In 22 French nursing homes, COVID‐19 was diagnosed with real‐time reverse‐transcriptase polymerase chain reaction (RT‐PCR) for SARS‐CoV‐2. Blood S‐RDB‐protein IgG and nucleocapsid (N) IgG protein (N‐protein IgG) were measured 21–24 days after the first jab (1,004 residents) and 6 weeks after the second (820 residents). Results In 735 residents without prior COVID‐19, 41.7% remained seronegative for S‐RDB‐protein IgG after the first jab vs. 2.1% of the 270 RT‐PCR‐positive residents ( p < 0.001). After the second jab, 3% of the 586 residents without prior COVID‐19 remained seronegative. However, 26.5% had low S‐RDB‐protein IgG levels (50–1050 UA/ml) vs. 6.4% of the 222 residents with prior COVID‐19. Residents with an older infection (first wave), or with N‐protein IgG at the time of vaccination, had the highest S‐RDB‐protein IgG levels. Residents with a prior COVID‐19 infection had higher S‐RDB‐protein IgG levels after one jab than those without after two jabs. Interpretation A single vaccine jab is sufficient to reach a high humoral immune response in residents with prior COVID‐19. Most residents without prior COVID‐19 are seropositive for S‐RDB‐protein IgG after the second jab, but around 30% have low levels. Whether residents with no or low post‐vaccine S‐RDB protein IgG are at higher risk of symptomatic COVID‐19 requires further analysis.

Before alcohol withdrawal, MT markers were higher in patients with AUD than in HC. After 6 weeks of abstinence, an improvement in MT markers was observed. Our data suggest that there is a link between MT, its improvement, BMI, and cannabis consumption.