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Controls in Experiments

Controls in Experiments

When conducting an experiment, it is crucial to have control to reduce bias and accurately measure the dependent variables. It also marks the results more reliable. Controls are elements in an experiment that have the same characteristics as the treatment groups but are not affected by the independent variable. By sorting these data into control and experimental conditions, the relationship between the dependent and independent variables can be drawn. A randomized experiment always includes a...

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Updated: Nov 6, 2025

Author Spotlight: Advancements in Multiplex Detection of Respiratory Viruses

Author Spotlight: Advancements in Multiplex Detection of Respiratory Viruses

Published on: November 10, 2023

COVID-19: The experience from Beijing, China.

¹Department of Dermatology, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China.

Clinics in Dermatology

|May 11, 2021

Summary

Few coronavirus disease 2019 (COVID-19) patients reported skin lesions in Beijing. However, medical staff experienced significant skin damage from protective equipment during epidemic prevention efforts.

Area of Science:

Dermatology
Epidemiology
Infectious Diseases

Background:

Coronavirus disease 2019 (COVID-19) emerged as a global health crisis.
Understanding its clinical manifestations, including dermatological effects, is crucial.
The impact on healthcare workers requires specific attention.

Purpose of the Study:

To summarize the epidemiology of COVID-19 in Beijing.
To highlight clinical manifestations, focusing on skin findings.
To assess cutaneous damage among medical staff due to protective measures.

Main Methods:

Review of COVID-19 cases in Beijing.
Analysis of reported clinical and skin manifestations.
Assessment of skin damage in healthcare professionals.

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Main Results:

A low incidence of skin lesions was observed in COVID-19 patients in Beijing.
Cutaneous damage was frequently reported among medical staff using personal protective equipment.
Dermatological concerns for healthcare workers were identified.

Conclusions:

While COVID-19 skin lesions are rare, dermatologists must prioritize self-protection.
The use of personal protective equipment poses a significant risk of skin damage to medical staff.
Further attention to skin health in healthcare workers during pandemics is warranted.