https://www.cdc.gov/heartdisease/risk_factors.htm.
https://www.who.int/news-room/fact-sheets/detail/hypertension.
these two websites shall be used as some of my citing sources.
need my thesis to be 3-4 sentences long

this is my original thesis:
Hypertension is a disease or condition that is also known as high blood pressure that is dangerous if not treated on time and can lead to death.  Many people suffer from it and may not even know it and it is often called the silent killer. It can affect anyone no matter age, gender or ethnicity.