User talk:92.30.164.21

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Someone using this IP address, 92.30.164.21, has made edits to Immunoglobulin class switching that do not conform to our policies and therefore have been reverted. For more information on this, see Wikipedia's policies on vandalism and limits on acceptable additions. If you'd like to experiment with the syntax, please do so in the sandbox rather than in articles. If you did not do this, you may wish to consider [ getting a username] to avoid confusion with other editors.

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Again, welcome! Flyer22 Frozen (talk) 08:58, 26 April 2020 (UTC)