关于so... that...中的省略

so... that... 前后主语一致的话，that中的主语可以省略么？

Example: og136 Although schistosomiasis is not often fatal, it is so debilitating that it has become an economic drain on many developing countries.

that可以省略么？

so that 后面的主语当然不能省略，that后面应该跟一整句话。