The CDC guidelines for Covid 19 are isolate yourself in a room especially the first 5 days because during this time a patient is most infections. Keep the room ventilated and wear a high quality mask. Do not travel.
They change frequentely because they are studying the virus and its mutations closely.
The main differece is, when the CDC discovers a public health risk, such as the Covid-19 pandemic, they will issue a series recommendations on how to keep everyone safe. OSHA will take those recommendations and create regulations that workplaces have to follow.
Negative and positive testing means that if one has an active infection he/she will test positive and if one doesnt have an active infection then he/she will test negative.
Yes, it is one of the earliest symptom of Covid 19 infection.
Mucormycosis, also known as black fungus or zygomycosis, is caused by a group of mould called mucormycetes. The symptoms include blisters which turn blackish. You are recommended to show to a skin specialist immediately.