It turns out that Threads’ recently introduced keyword-searching abilities won’t work for all topics. The app is currently blocking searches for a number of “potentially sensitive” words, including “vaccines,” “covid,” and other variations of words that have previously been linked to misinformation on Meta’s platform.

The limits, which were first reported by The Washington Post, are an apparent attempt to prevent controversial content from spreading on Meta’s newest app. The company has blocked a number of covid and vaccine-related terms, including “covid,” “coronavirus,” “covid-19,” “vaccines” and “covid vaccines,” as well as other terms associated with potentially unsavory content like “gore,” nude,” and “sex.”