Normal Temperature - who says?


Here are 290 measurements of my temperature, all normal.
My normal temp



One sees that temp is highest in the evening.
My average temp throughout the day is 98.04°F. 
97.9°F in the morning, and a high of 98.4°F in the evening.
So if I have a temp of 98.5°F or higher I have a fever.
When nurses called in the middle of the night during Residency,
if the patient didn't have a temp of 38.5°C (101.3°F) or higher, we'd yell at the nurse and go back to sleep.
So what to do? 
  • Take temp morning and evening but not more, unless really starting to feel feverish.
  • Know that in the evening if you notice your temp has gone up, that may be quite normal.
  • Recall that most people presenting with this illness do not have a fever. Using it as a guide to having this illness or not can therefore be flawed.
  • The above graphic reminds that "normal" may not be "98.6°F" like we all learned.


Here is one list of symptom frequency when people get COVID-19:


"The most common initial symptoms were cough (51%), fever (41%), and myalgia (achy muscles) (38%). Additional common symptoms included headache (30%), nasal congestion and/or runny nose (28%), severe fatigue (26%), and sore or scratchy throat (25%). Loss of smell (16%) and loss of taste (15%)." Notice that shortness of breath is not on this list.
But here is another list: This one from the CDC. 
Signs and Symptoms


Now "fever" has jumped up from 41% to 71%. And if one has fever, plus cough or shortness of breath, that's how 93% presented in the US says CDC. All of the above, tested positive.


Here is a list from Canada. But it also combines results reported from several countries:


Frequency of symptoms (Canada)


 Notice the wide spread for each symptom. Fever for example, from 44 to 91%.

Diarrhea 5 to 24%.



And the point is?


Lots of variability in the presenting symptoms. 


Can you have NO symptoms and a postive test? Yes. You are either asymptomatic (no symptoms ever, but a carrier of the virus) or pre-symptomatic (and will get symptoms in a few days).


If you have no symptoms and a negative test: feel reassured.


If you have some of the above symptoms, common in several other illnesses besides COVID-19, and your test is negative, either you don't have it, or you do and as in 37% of tests, it's a false negative.


Not an instantly clear situation.


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