Global incidence pattern and factors associated with common cutaneous reactions related to COVID-19 vaccination of 2.55 million participants in real-world settings: A systematic review and meta-analysis.

Background: Understanding the incidence pattern of cutaneous reactions is crucial for promoting COVID-19 vaccination. We aimed to report the global incidence pattern of, and factors associated with common cutaneous reactions related to COVID-19 vaccination in real-world settings.

Methods: We searched five databases (PubMed, Web of Science, Embase, CNKI, and Wanfang) from inception to May 13, 2022, for studies reporting the incidence of common cutaneous reactions related to COVID-19 vaccines in real-world settings.

Strain induced shift of Dirac points and the pseudo-magnetic field in graphene.

We prove that the strain induced shift of the Dirac points in graphene is a curl field if the strain is nonuniform. This curl field provides a geometrical explanation of the strain induced pseudo-magnetic field. We also prove that the Dirac points must be confined within two triangles, each one having one-eighth the area of the Brillouin zone.