New guidance has been published on using a licensed vaccine during outbreaks of a specific virus. This vaccine is currently only recommended for use in research settings. A particular approach to testing the vaccine's effectiveness is considered the most reliable.

Further details are available on the use of this vaccine, including recommendations for its use. The guidance was published after a meeting of experts on immunization. The updated guidance outlines several key points, but for full information, it is necessary to consult the original publication.