Up-to-date Coronavirus COVID-19 guidance for physicians & pharmacists from Johns Hopkins ABX. Disease spectrum, testing, and clinical trials
Viral shedding by asymptomatic people may represent a subset of total infections, but uncertainty remains regarding how much they contribute to totals.
Viral shedding may antedate symptoms, usually two days.
Viral titers are highest in the earliest phases of infection, 1-2 days before the onset of symptoms, and then in the first 4-6 days of illness in patients without immunosuppression.
COVID-19 Incubation Period: What's the incubation period for coronavirus? Learn when the virus is most contagious, & how long to quarantine
When Is COVID-19 the Most Contagious?
Researchers estimate that people who get infected with COVID-19 can spread it to others 2-3 days before symptoms start and are most contagious 1-2 days before they feel sick.
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How long after exposure will you test positive for COVID-19?
Depending on which COVID-19 variant you've been exposed to, you may test positive 3-5 days later. If you've been exposed to the virus but don't have any symptoms, wait for 5 days before you get tested. If you test too early and you do have COVID-19, you may falsely test negative.
COVID-19 studies have been appearing in medical research journals or made available in pre-print form, since January. SARS-CoV-2, the virus which causes COVID-19, has had a profound impact on human society in every facet. In a way, you could say this pandemic is responsible for a lot more than sickness...
It has recently come to my attention that there are many people in my country, United States, whom the education system has failed. I kind of want to bring awareness to things I thought were common knowledge but aren't based on many adults I have asked about certain topics. I am from Texas, and I remember learning these things as a high schooler, but I will start little info dumps about these things that interest me.
With the current circumstances surrounding COVID 19, especially in the state of Texas with our lovely governor allowing everyone to stop wearing masks, and people asking me why I still choose to wear a mask every day, I find her case to be really relevant and interesting so buckle up all 50 of my followers, (mostly bots) cause we're learning today!
Today I will start with Mary Mallon aka Typhoid Mary.
Mary Mallon was born in 1869 and immigrated to the United States from Ireland in 1884. From 1900-1907 she was a cook for eight different wealthy families in New York.
So what do I find so interesting about her? She was the most infamous asymptomatic carrier of the bacteria Salmonella typhi which causes typhoid fever. Infamous mostly because of her denial that she was sick and that she couldn't possibly be making others sick.
(Salmonella typhi happens to come from human feces, and of course during this time, hand washing wasn't a major requirement for anyone, not even cooks. )
So we can already see where this is going. Mary was a cook, and probably didn't wash her hands often, and typhoid can be serious since it causes fever, abdominal pain, confusion, rashes and so on. Mary is said to have infected possibly 53 people, but it is hard to say as she used many aliases in her jobs. She is only directly linked to three deaths, which is not as many deaths proportionately to cases she may have caused. It should also be noted that there were many cases of typhoid not directly linked to Mary at all, and there were probably many other asymptomatic carriers out there too.
Alas, poor Mary was the one who got in trouble for her disease. She was put into quarantine first in 1907 and released again in 1910. Several health officials thought that quarantine was a harsh punishment, and she just needed to be taught how to properly handle food (go figure), but she was still forced into quarantine.
When Mary was released, she was given a job as a laundress, which paid significantly less than a cook, but she would do less harm there, yes? Nope. She soon faked her identity and went back to being a cook (honestly, it did make her more money). So, she was put into quarantine once more in 1915, and remained there, at Riverside Hospital, until she died in 1938.
What I find so fascinating from this piece of U.S. history is how few people seem to know anything about it. I find that there is a significant amount of adults, my age and older, who are surprisingly unaware of how being an asymptomatic carrier actually works. I would think that if Mary Mallon was taught more widely in public education, we might have a better grasp of the spread of diseases in this country, seeing as poor Mary was the poster child for the spread of disease in her time.
I leave you with time to think about being an asymptomatic carrier of any disease, and ask you to please continue to wear a mask for now.
Officials push 'ASAP' COVID-19 testing program; Gov. Sununu recently took test
Officials push ‘ASAP’ COVID-19 testing program; Gov. Sununu recently took test
Gov. Chris Sununu was tried for COVID-19 throughout the end of the week, under the state’s new “ASAP” testing program, to attempt to distinguish asymptomatic instances of coronavirus.
State authorities are empowering the general, asymptomatic open to step through an examination. Sununu said he halted by a neighborhood drug store and the procedure was brisk and simple.
