All PSU international students and their families are required by law to carry health insurance for the duration of their studies. Health care in the U.S. is very expensive and this is intended to protect you from serious financial hardship.
It is your responsibility to comply with insurance requirements by checking your student bill for insurance fees each term or meeting all of the requirements for a waiver.
Here is a video that helps you understand the healthcare system in the U.S. The video has subtitles in Spanish, Portuguese, Arabic, Chinese and English.