https://www.selleckchem.com/products/Pyroxamide(NSC-696085).html To report the detection of retinitis in the second eye of a patient with viral acute retinal necrosis (ARN), before the appearance of clinical change, using swept-source optical coherence tomography. A 63 year-old male developed right-sided varicella-zoster virus (VZV) ARN, confirmed with aqueous sampling. High-dose intravenous aciclovir caused renal impairment and was suspended for two-days. One day later, left eye macular SS-OCT revealed focal retinal thickening and disruption of retinal architecture without clinically detectable retinitis. The patient was asymptomatic. Aqueous sampling was VZV PCR positive. He received bilateral foscarnet injections and renal adjusted dose of aciclovir. The left OCT signs improved with full restoration of retinal layers. We report for the first time the use of OCT to detect pre-clinical second eye retinitis during ARN. Prompt diagnosis and combined systemic and intensive local antiviral therapy resulted in a favourable structural and functional outcome. We report for the first time the use of OCT to detect pre-clinical second eye retinitis during ARN. Prompt diagnosis and combined systemic and intensive local antiviral therapy resulted in a favourable structural and functional outcome.Woolcott, Orison O., and Richard N. Bergman. Mortality attributed to COVID-19 in high-altitude populations. High Alt Med Biol. 00000-000, 2020. Background Since partial oxygen pressure decreases as altitude increases, environmental hypoxia could worsen Coronavirus Disease 2019 (COVID-19) patient's hypoxemia. We compared COVID-19 mortality at different altitudes. Methods Retrospective analysis of population-level data on COVID-19 deaths was conducted in the United States (1,016 counties) and Mexico (567 municipalities). Mixed-model Poisson regression analysis of the association between altitude and COVID-19 mortality was conducted using individual-level data from 40,168 Mexican subjects