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In this study, the COVID-19 pandemic was associated with increased diagnoses of acne and telogen effluvium, particularly among patients with COVID-19, at a New York City hospital system.

This study describes previously unknown immune characteristics of the normal human nail, highlighting its similarities to the hair follicle immune system and suggesting an immune privilege in the proximal nail matrix that both provides autoimmunity protection and presents infection susceptibility.

In this review, the authors highlighted the potential of natural polysaccharides from plants, animals, and microbes to modulate immune responses, reduce inflammation, and strengthen the intestinal barrier, suggesting their promising role as immunomodulatory agents in pharmaceutical applications.

This review discusses recent advances in understanding alopecia areata's disease mechanisms and highlights JAK molecules as promising therapeutic targets, but reports no new clinical results; controlled trials are needed.

2011 dermatological research found new skin aging markers, hair loss causes, skin defense mechanisms, and potential for new treatments.