Lecture theatres, science laboratories and student unions are among UK universities buildings shut down because of crumbling concrete.
Fourteen universities have closed or partially closed areas containing reinforced autoclaved aerated concrete (RAAC).
Some student accommodation has also been affected, as universities make areas safe.
The Department for Education (DFE) advised schools, colleges and nurseries in England to vacate areas known to contain RAAC, unless suitable mitigating measures had been put in place.
Other public buildings across the UK, built or modified between the 1950s and the mid-1990s, are also affected.
More hospitals have also come forward to report that they may have been built using RAAC and the government says it is working quickly to establish the scale of the problem.
Many buildings have been managing and monitoring the situation for years, in line with previous guidance, but some are now taking extra precautions.