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. 2021 Sep 2;23(9):e28975. doi: 10.2196/28975

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©Ikpe Justice Akpan, Obianuju Genevieve Aguolu, Yawo Mamoua Kobara, Rouzbeh Razavi, Asuama A Akpan, Murali Shanker. Originally published in the Journal of Medical Internet Research (https://www.jmir.org), 02.09.2021.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work, first published in the Journal of Medical Internet Research, is properly cited. The complete bibliographic information, a link to the original publication on https://www.jmir.org/, as well as this copyright and license information must be included.

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The average search index for pre-existing keywords before and during the COVID-19 pandemic. MERS: Middle East respiratory syndrome; SARS: severe acute respiratory syndrome.