On Sunday afternoon when word got out about Nia Jax, Shayna Baszler and Nikki Cross being pulled from WWE Clash Of Champions, the speculation was that it was COVID-19 related.
The reason why they were pulled was indeed related to COVID-19 but it's not necessarily because they have the virus. Dave Meltzer noted on Wrestling Observer Radio that at least one or two of the women (and maybe all of them) were pulled because they were near someone who tested positive for the virus.
Meltzer said, "The actual issue is that it's the COVID situation. I know that at least one of the three and I think two of the three do not have COVID but they were in contact with someone who does. It might even be all three but I know for sure one and I think two. [WWE] was afraid of a COVID spread, they were in contact so they were not allowed on the show. I don't know how all their healths are but at least two of the three are not unhealthy as we speak. Hopefully, they do not get unhealthy so that is the situation there."
Nia Jax did not seem too happy about WWE announcing that she was not medically cleared. That was the explanation given during the pay-per-view.