Spinning off comments by UK’s ENT president...and the fact that TORY MP Nadine Dorries has revealed she has completely lost her senses of taste and smell after contracting COVID-19, this is my take.
(For information purposes only. See or call your physician.)
Anyone familiar with PD research on the loss of smell (Haehner, et al, 2011) or the work of Pinto and McClintock (2014) understands that the loss of smell accompanies the progression of PD and from Pinto/McClintock’s work it accompanies the progression of mortality in certain cases by a factor of three (3).
Although some will dismiss their work, Pinto/McClintock’s work should not be dismissed because they did not deal with PD. They tested more than 3,000 people between the ages of 57 and 85, which is also the wheel house for PD, particularly males.
1) A TOTAL loss of smell resulted in 3x times greater mortality regardless of co-factor(s) like diabetes or cardio vascular disease.
2) They didn’t know why this increase in mortality occurred, but the olfactory nerve, the sole conduit from a person's nose to their brain, also happens to be the only cranial nerve that is directly exposed to the environment, and hence a primary conduit for COVID-19 if suspended in air as particulate matter, which it often is.
IMO, the loss of smell should not be dismissed as an possible indicator of COVID-19 infection (or PD progression for that matter). It isn't a perfect indicator, but it shouldn't be dismissed as irrelevant.
(I am busy closing down my clinical trials, so I have no time to respond to comments or questions.)