Catch cold again

I am curious why currently easy to catch cold. Last time purposely walk under the rain but now need shed under the rain. Few reasons I considered after some experience of catching cold.

1. Pressure on study?


2. Age problem?(I bet it is not)


3. Sleeping time up and down - sleep late but wake up early


Anyway, just want to tell you guys you are not as strong as before already. Take care everyone =)


***quite worrying copyrighted matter.