Less than 86.5 % of reviews of the film 28 Days Later on Rotten Tomatoes were positive .
Based on 220 reviews collected by the film review aggregator Rotten Tomatoes , 87 % of critics gave 28 Days Later a positive review with an average score of 7.4/10 and the site 's consensus reads : `` Kinetically directed by Danny Boyle , 28 Days Later is both a terrifying zombie movie and a sharp political allegory . ''
28 Days Later