Frequency of terms appearing in a Wikipedia-indexed set of papers on COVID-19 vaccine hesitancy. This screenshot is in the public domain and available via Wikimedia Commons.
	Part of: Rasberry L, Mietchen D (2021) Wikipedia for multilingual COVID-19 vaccine education at scale. Research Ideas and Outcomes 7: e70042. https://doi.org/10.3897/rio.7.e70042