Rotten Tomatoes: 28 Days
- Compiled reviews from top critics. Also Includes news, trailers, screen captures and synopsis.
- http://www.rottentomatoes.com/m/28_days/

PopMatters: 28 Days
- Comprehensive review of the film by critic Cynthia Fuchs. Critical of the film's plot and treatment of its subject matter.
- http://popmatters.com/film/reviews/t/28-days.html

Metacritic.com: 28 Days
- A cross-section of reviews from top critics, ranked by review score.
- http://www.metacritic.com/video/titles/28days

HaroOnline: 28 Days
- Negative review of the film. Very critical of Susannah Grant's script.
- http://www.haro-online.com/movies/28days.html

Apollo Movie Guide: 28 Days
- Moderate review of the Sandra Bullock film.
- http://apolloguide.com/mov_revtemp.asp?CId=2111

All Reviews: 28 Days
- Collected reviews of the film.
- http://www.all-reviews.com/videos/days-28.htm