Also don't use masks unless you have symptoms so that hospitals and clinics can get enough.

And according to the new england journal of medicine: https://www.nejm.org/doi/full/10.1056/NEJMoa2002032?query=featured_home Out of 1099 COVID patients in china: Fever was present in 43.8% of the patients on admission but developed in 88.7% during hospitalization. The second most common symptom was cough (67.8%); Yet 13.9% of the patients had sore throat as a clinical manifestation.

Thank you for your comment. Coming from a front line infectious disease specialist working directly with Covid-19 patients in an infected region: We’re talking about evidence based medicine here rather than just “theories” or guesses. Indeed, dry cough and URTI symptoms including sore throat are much more common than LRTI symptoms like sputum or productive cough for the Covid-19. According to the lancet: https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(20)30211-7/fulltext - The order of the most common clinical manifestations include: 1. fever (82 [83%] patients) 3. cough (81 [82%] patients) 5. shortness of breath (31 [31%] patients) 7. muscle ache (11 [11%] patients) 9. confusion (nine [9%] patients) 11. headache (eight [8%] patients) 13. sore throat (five [5%] patients) 15. rhinorrhoea (four [4%] patients) 17. chest pain (two [2%] patients) 19. diarrhoea (two [2%] patients) 21. nausea and vomiting (one [1%] patient). LRTI symptoms are late signs.