我這些天有好幾個80歲以上的病人，除了low degree fever，沒有其他typical covid symptoms, 基本都是supportive treatment，預防並發症，和緩解症狀治療，大部分幾天能安全出院。
一個81歲的老奶奶，症狀嚴重，發病早期給了Remdesivir x 5 days ; 另一個40多歲的墨兄，SOB 嚴重，血氧低，錯過了Remdesivir最佳期，給了convalescent plasma 。
有症狀的病人，如果Rapid test 是陰性，我們會做second test，因為如果 viral load 不夠，會呈false negative。 如果病人present病程超過7天，我們會order PCR test。The duration of viral shedding varies significantly and may depend on severity (based on testing of oropharyngeal samples ranged from 8-37 days, with a median of 20 days),
即便Rapid 和 PCR 都呈陰性，CXR 顯示有不正常發現（Patchy ground glass opacities), 我們會把病人做PUI 處理，一樣隔離和治療。 而且會重複CXR，因為Early in the course of the disease, there are many mildly symptomatic patients with clear chest x-rays that quickly progress over days to patchy ground glass opacities.
有的症狀病人，Case-by-case，同時還會做respiratory viral panel, strep throat 和其他Labs；根據病情，有的也會做Antibody Test (IgM, IgG , but It is not necessarily confer immunity to COVID-19 and it is unknown how long antibodies last）
PS，
閻老在症狀幾天後，檢測 covid test negative，based on cases and studies，采樣的viral loading dose應該合適，采樣的技術問題除外。
閻老，也許是flu造成的心肌炎導致直接死亡。 Acute myocarditis is a well-known complication of influenza infection。 Myocarditis can be life-threatening if not treated in time。（我不知道閻老病程的具體細節，無法判斷）
R.I.P，閻老！
補充一個Research information for PCR test
Over the 4 days between infection (day 1) to the typical time of symptom onset (day 5), the probability of a false-negative result in an infected person decreased from 100% on day 1 (95% CI, 100%-100%) to 67% (CI, 27% - 94%) on day 4.
On the day of symptom onset (day 5), the median false-negative rate was 38% (CI, 18% to 65%).
On day 8 the median false-negative rate decreased to 20% (CI, 12%- 30%), and then began to increase again (21% [CI 13%-31%] on day 9). On day 21 the median false negative rate was 66% (CI, 54% -77%).
