-I shall stress to use these resources CAREFULLY and NOT TO go directly to the ER of a hospital unless it's a life or death situation. If while at the CAP/UCAP medical personnel deem necessary for you to go to a hospital they'll derive you to the appropriate one. This recommendation is especially sensible during this time of national health crisis. Carry your passport (and your credit card) with you, because, while medical emergency assistance in Catalonia is free of charge for everybody, under the universal health coverage, other services to non-residents are not. Still, don't worry, everybody that needs emergency assistance gets treated no matter whether resident or not and whether you have a credit card or not. I shall stress: emergency assistance only (situations that can place you or others in immediate danger: ie a heart attack or becoming infected with a contagious virus)
-Note our health care system is a mixed one, with public and private providers (hospitals and clinics). Most major private centres have agreements with the Catalan National Health Service to provide certain types of assistance under the "universal healthcare coverage system" (meaning, free of charge to the user) but not all and not for all services. If you go to a hospital on your accord, you need to understand whether it's a private or a public hospital since, as a non-resident, you might end up being billed for the full service. Since you're unlikely to know which one is which, do call your insurer before going to any hospital.
MOOD ON THE GROUND
Barcelonians -and the rest of Catalans for that matter- are, for the most part, very open to foreigners both residents and visitors. At present, during this crisis, there is no tangible resentment and/or racism against any nationality in particular, including Chinese nationals and/or other Asian-related ones.
As per daily life, most people here in Barcelona are expectative with the situation but not in a panic. In fact, one can see life going "as usual" in most cases. Needless to say, the troublesome situation in some neighbouring areas (ie Madrid to the West, or Italy to the East) have increased the concern but, unless/until the situation here changes, any visitor will still be able to "enjoy" his/her trip (minus the restrictions announced before). Until now, we're far from the situation in those areas but Barcelona is a major hub in Europe for visitors (businesses, congresses, tourists, students...) so spread of the contagion is likely and the situation could change for the worst (more restrictions put in place) in the coming weeks.
Catalonia's government has certain powers in taking its own decisions/measures as it sees fit, so any advice given by your government that affects "Spain" might or might not be 100% accurate at a given time. Some autonomous communities (=provinces/states) in Spain might have in place different measures from others and these can be more restrictive.
Sources for LOCAL information in English here in Catalonia:
Health Dept of the Generalitat de Catalunya (Government of Catalonia): http://canalsalut.gencat.cat/ca/salut-a-z/c/coronavirus-2019-ncov/
News channel from the public national broadcaster of Catalonia: https://www.ccma.cat/324/ -not in English, use Google Translate
PS: as I am writing this, Italy has announced a "total closure" of the country for the next two weeks, meaning all shops, bars and restaurants will be closed.