We appreciate your enthusiasm and desire to help, but reccomending that people make medical devices which are normally produced by companies who must follow strict guidelines can be irresponsible. A lot of stuff online can not be trusted, and even if you do have authorization to make regulated hospital equipment from a legitimate source, this doesn’t mean that everyone can join in. There is a lot to consider like sterilization, safe manufacture, and actual effectiveness when undertaking a task like this.
What can we do to help? STOP THE SPREAD! Practice social distancing. Eat healthful foods and drink water. Obey local regulations as far as you are able. Don’t hoard food and supplies, and pray that this ends soon.