This site is a mirror of David Tuller’s posts at virology blog, made because a character encoding issue at the original site rendered many of his early posts difficult to read. It should be kept fairly in sync with the original posts, although any comments made on the original site will not be copied here. (Posts prior to August of 2022 may include comments copied from the original site, due to a difference in the way the initial copy was made, compared to the mechanism for ongoing updates.)