It is only natural that, with the awareness of and sensitivity for our state of health, our intentions are good and sincere when it comes to performing on instruments which will do us no harm.
That having been said, there is no need to fear that you will contract Covid-19, or any virus, from your instrument unless you have allowed someone to play it who is a carrier! One of the instructions about your instruments included the rule that NOBODY is to handle your instrument. (Remember? "If it's not yours, don't touch it!) Now, it IS very logical that we should clean our instruments periodically. If you have not cleaned your mouthpiece for over a month, that should be a priority!
It is also logical that, if we are concerned about the current health crisis, we want to reduce the likelihood that we contract COVID-19, or other illnesses. With that in mind, please be aware that the Corona virus is a protein. It cannot survive without host cells. It will "die" (there is an interesting question...is it really alive?) when exposed to ultra-violet light, or left upon the following surfaces:
The following information (green link) is from the National Association of Music Merchants, the Music Educators' National Conference, and National Federation of State High School Associations. I have seen similar determinations and policies from the University of Nevada and Las Vegas and the University of Alabama - Birmingham.
(Do NOT use bore oil...most of you have plastic clarinets, so it is completely unnecessary!
Also, it's VERY easy to mess it up...leave it to a pro, for now!)
(This is by FAR the best oboe video. He uses proper hand placement when assembling/disassembling the oboe, and reminds you to check for twists and knots before swabbing!)