Typhoid Mary was Typhoid fever which is a bacterial infection spread by an infected person contaminating food & water by poor hygiene measures after using the bathroom. In her case, she just didn't wash her hands after her trips to the T and contaminated the food she prepared as a cook (gross). Asymptomatic cases with Typhoid is low - 1% to 6% at best.
Asymptomatic spread with Covid is very rare so testing
asymptomatic people means nothing other than building up cases that some governors use to justify their business restrictions, mask mandates, no in-person schooling, no fans at sporting events, etc. The governor of the state I live in (Colo) has gone so far in stating "just act as if everybody might have coronavirus" and has demanded more people get tested and of course mask mandates. All this does is create more fear & hysteria with people who many are already on the edge with this virus.
I talk to a lot of people at the gym I work out at - people are scared to death of getting infected. And they're suspicious of everyone who coughs, sneezes, clears their throat, etc (I was doing some heavy spinning in the club's spin room the other day when I had some coughing & clearing of my throat episodes due to
allergies when two other members there abruptly left giving me dirty looks...sad). When I ask people why they're so frightened & suspicious, many refer to the governor's comment that everybody might have the virus. It's just plain ridiculous when far less people have/had Covid and 40% of asymptomatic cases are no threat in spreading the virus. It's amazing but not surprising given the MSM that so many lower-risk people live in fear & anxiety of this virus.
Asymptomatic cases are "least likely to infect their close contacts," study finds.
www.google.com