Questions tagged [infection]

Questions regarding the ability of organisms to cause illness or disease in the body upon entering and multiplying in it should use this tag. It may be a virus, bacterium, parasite or other organism which uses the body as a host to the host's detriment. Some infections are subclinical or result in carrier states. Symbiosis is not considered an infection.

Filter by
Sorted by
Tagged with
25
votes
2answers
4k views

Would the human seasonal coronaviruses be just as deadly as COVID-19 in a population with no prior immunity?

Presuming that we were able to find a person who was never exposed to any of the human seasonal coronaviruses (part of the viruses that cause the common cold), would the virus be just as deadly for ...
24
votes
2answers
5k views

Effect of the common cold on the immune system

I've heard that once a person catches a cold, his whole immune system becomes weak and is affected. In what way does having a cold influence the immune system? If it does weaken it, how can one keep ...
22
votes
3answers
8k views

Father gets chickenpox, but doesn't infect his two children. How is this possible?

My brother in law got chickenpox, yet somehow he didn't infect my two nephews, even though they are living together. According to wikipedia, varicella has an infection rate of 90%: Varicella is ...
22
votes
3answers
1k views

Can being cold or wet be a significant influence in getting the common cold?

As most people know, it's a common thing to say something like "better wear a sweater, otherwise I'll get the cold tomorrow." In my limited understanding, the common cold is caused by a virus. How ...
21
votes
2answers
1k views

What is the main way COVID-19 spreads?

Reading numerous news articles about COVID-19, I got confused as to what is its main transmission route. In particular, I am confused as to whether it is direct landing of respiratory droplets in ...
15
votes
3answers
5k views

If a SARS-CoV-2 asymptomatic infected individual is exposed to a high viral load, could they develop COVID-19 disease?

I would add my own research if I could to respect site rules, but I can't. There are no studies on SARS-CoV-2, all I can find is for SARS-CoV-1 and some Chinese information based studies. My ...
15
votes
2answers
1k views

Why does whooping cough last so long and can the duration of cough be reduced?

Whooping cough is a chronic cough resulting from an infection with the bacteria Bordetella Pertussis. The cough resulting from the infection may last several weeks, and as such whooping cough is ...
14
votes
1answer
116 views

How do tubes help treat ear infections?

My young son keeps getting ear infections. The otolaryngologist want to perform surgery to put tubes in his ear drums. How does putting a tube in the ear drum help with the ear infections?
12
votes
1answer
229 views

How effective was the 2014-2015 influenza vaccination?

I’m aware that the CDC released this abysmal report on the effectiveness of this year’s influenza vaccination, including data collected through Jan 30, 2015. In practical terms, this means the flu ...
11
votes
1answer
390 views

How does a MRSA test work?

Let's assume we have a patient with acute infection. The doctor suspects MRSA. A culture is taken, brought to the lab, and then what? I'm interested to hear what are the usual steps a laboratory ...
11
votes
2answers
396 views

Does chronic Lyme disease really exist?

It seems that Lyme disease infection (borreliosis) can persist despite antibiotic treatment in early stages. Is there any definite proof of this in medical literature? If there is, why is Post-...
10
votes
1answer
421 views

Can Helicobacter pylori affect the body outside of the digestive system?

I had a discussion with a friend who's going through some medical issues as of lately. She underwent a few tests and met a few doctors which inquired about her medical history. She has frequent ...
9
votes
1answer
806 views

How does a breeze cause irritated nose and throat?

The question popped in my head as to how a breeze (let's say one from a ventilator or ACU) can cause irritation in certain respiratory systems (e.g. nose/throat). I haven't really found a suitable ...
9
votes
2answers
1k views

Do I have to wait after a tick bite to get vaccinated for encephalitis?

I recently removed a tick I must have caught while camping. Thinking of my plans for the summer (which involve frequently changing clothes in the wilderness), I realized I'd like to get a vaccination ...
8
votes
1answer
9k views

Does a fungal infection transmit in swimming pools?

I've contracted a fungal infection on my nails. My doctor told me not to swim in swimming pools but in the ocean/lake, because swimming pools would make the infection worse and it could transmit to ...
8
votes
1answer
1k views

Can “Waterproof Swim Cap” be good for people with ear infections?

OK, I have an ear infection. The doctor says that I should not allow any water to go into my ears. However, I want to swim, but I don't want any water (even a tiny drop of water) go into my ears. So, ...
8
votes
1answer
108 views

How to tell if the common cold has turned to an infection

I am very susceptible to the common cold. I get it at least 2 - 3 times a year. Sometimes it goes away in a couple of days, sometimes it develops into a nasty throat/lung infection with an awful cough ...
7
votes
2answers
98 views

Are there diseases for which infection does not grant lasting immunity but a vaccine does?

There has been a lot of discussion about whether people who have COVID-19 and recover will have long-lasting immunity. At the same time, work is underway to create a vaccine for this disease. But if ...
7
votes
2answers
208 views

Difference between common cold and flu?

What are the differences between flus and colds? I don't know about English, but in Spanish they confuse it very often when using words gripe and resfriado. Maybe it's not the case in English, but I ...
7
votes
2answers
4k views

Tuberculosis: Lung scarring and weight gain

I have a few questions regarding tuberculosis: If a person is cured of Tuberculosis, is it compulsory for all patients effected by Tb to have a patch/scar on their lung? (references for patch) ...
7
votes
1answer
73 views

How can there be a level of HIV viral load that will make infecting others impossible?

I just read about a court case where someone was acquitted for "being dangerous to the surrounding" by having unprotected sex when diagnosed with HIV. The reasoning was that since this person was ...
7
votes
2answers
90 views

What causes the long tiredness caused by the infectious mononucleosis disease (by the Epstein-Barr virus)?

Of course to cure from a fever in general takes already time to recover from, but in the kissing disease it takes often much longer (sometimes even years) and the tiredness is much more a symptom of ...
7
votes
2answers
232 views

How accurate is testing for HSV-2?

I've never had any symptoms of a Herpes simplex virus 2 infection. However, I want to find out if I carry this type of virus in my body. Is it true that there is an antibody test to answer that ...
6
votes
1answer
107 views

Why are people with certain blood types more/less susceptible to norovirus?

Infection with some types of norovirus appear to be rarer in people with some blood types than in others, see Norwalk Virus Infection and Disease Is Associated with ABO Histo-Blood Group Type, from ...
6
votes
1answer
779 views

What are the dangers of sitting on a public toilet seat?

Growing up, I was taught to cover public toilets with toilet paper before sitting on them. This was to protect me from diseases left by other users of the toilet. But can one actually get dangerous ...
6
votes
1answer
4k views

Are ear infections more likely when visiting high altitudes?

We recently took our toddler to the Alps, and I was surprised when multiple people asked me if I was worried about her getting an ear infection due to the high altitude (the highest point was 2770 m). ...
5
votes
1answer
10k views

Stray cat scratch - tetanus?

My mother was scratched by a stray cat that lives in our apartment basement two days ago (when she was going out for a walk). Long story short, after about thirty minutes of walking, she noticed the ...
5
votes
2answers
145 views

Can pathogens be transmitted from smelling something?

Long story short, when visiting neighbors the other day, a young child playing outside in the lawn stepped in some fresh animal fecal matter, and not knowing what it was, ended up taking off their ...
5
votes
1answer
67 views

Does being infected protect one from further infection?

Does being infected protect one from further infection? Intuition for why it could be the case When one catch an infective disease, its immune system becomes more active which could eventually also ...
5
votes
1answer
81 views

Are there high chances of long term complications from having TB?

Asking this question for somebody else here! Background: Some parents that I know are very concerned, as their 16 year old's friend, has extrapulmonary TB. They have been rather ill for several ...
5
votes
1answer
118 views

What exactly is inflammation?

If I get stung by a bee, I'll have inflammation in that area. But I've seen inflammation mentioned in the context of the whole body. What is this invisible inflammation, and how can its presence be ...
5
votes
1answer
4k views

Can typhoid occur multiple times?

Are there any chances of a person being reinfected with typhoid at regular intervals again if they don't follow proper medication and diet, even though they are cured or survived the first infection? ...
5
votes
1answer
1k views

Is a child with chickenpox who is vaccinated still contagious?

If a child is vaccinated for chickenpox but she gets the disease anyway, will her vaccination affect the likelihood of transmitting the disease to others?
5
votes
1answer
99 views

Does viral load of the initial COVID-19 infection affect its severity?

If someone gets infected by a droplet containing a high load of the SARS-CoV-2 virus would he be more likely to develop more severe symptoms compared to someone who gets infected by a droplet ...
5
votes
0answers
85 views

Is opening the chest cavity still considered dangerous to the spread\growth of disease? [closed]

Talking to relatives, it sounds like it was once believed that opening the chest cavity generally caused the spread and growth of diseases such as cancer because of the introduced oxygen into the area....
4
votes
3answers
2k views

Are motorcycle helmets effective in preventing Corona?

Can a full-head helmet with the visor closed prevent getting infected by the Corona virus during a casual interaction with a carrier? For example, when buying something at a store or discussing ...
4
votes
2answers
16k views

Will 70% isopropyl alcohol deactivate i.e. kill COVID-19?

Today the CDC released an official list of what kills the COVID-19 virus but the list does not mention 70% isopropyl alcohol. This is a fairly basic disinfectant and it seems it should have been on ...
4
votes
2answers
882 views

Is it possible that COVID-19 virus exist in a human body, but be absent from samples taken from nose and back of throat?

As specified in this link, COVID-19 tests start with taking samples from the nose or back or throat of people. Based on growth rate of this disease, I thought what if those samples are not positive (...
4
votes
1answer
75 views

Can dog bites cause Echinococcosis?

I know that dog bites are dangerous and can give you rabies,but can a dog bite cause Echinococcosis?
4
votes
1answer
3k views

Is typhoid contagious?

Can typhoid spread from one person to the other through any medium? if so what are the measures that should be taken to avoid it from spreading?
4
votes
1answer
94 views

Why stomach ulcer need more than one antibiotic at the same time?

Almost all treatment recommendation for gastritis, duodenitis or peptic ulcer that has Helicobacter pylori, calls for 2 or 3 antibiotic at the same time, why is that ? Why not use a single effective ...
4
votes
2answers
104 views

Can you recover from COVID-19, and then be reinfected so as to be a danger to other people?

Assuming I've contracted COVID-19 this January and made a full recovery and the antibodies have already left my body again. Now, I come into contact with someone who is sick and I inhale some COVID-19 ...
4
votes
1answer
5k views

Is E. coli contagious?

I have a girl that I'm seeing. She was just in the hospital about 2 weeks ago with an internal E.coli infection in her kidney (she had the other kidney removed due to cancer). She has been given a ton ...
4
votes
1answer
62 views

Do humidifiers help cure the flu?

According to this report, absolute humidity affects transmission and survival of the influenza virus with 90% accuracy. Lower humidity at winter promotes both the influenza virus transmission and its ...
4
votes
3answers
119 views

Why is FMT an effective treatment for Clostridium difficile?

I have a relative who has gone through a few different courses of antibiotics to combat a Clostridium difficile infection, with limited success. As I understand it, the initial antibiotic course for ...
4
votes
2answers
46 views

Can microbes be bred to be less infectious?

It was a strange idea that popped into my head. Could wild infectious microbes be bred (directed evolution) by some mechanism (such as through hypothetical drug therapies) to "domesticate" them and ...
4
votes
2answers
313 views

Can herpes spread if an infected (nonactive) person takes a bite of your burger?

A friend of mine suffers from Herpes (HSV) infection. He only told me about the same about 2 months back when we last met. Yesterday, at a restaurant he took a bite out of my burger twice. when I ...
4
votes
1answer
653 views

Can viruses be inherited?

In theory, any virus capable of infecting germ cells can plant its genetic load into the sperm/ova that will eventually become offspring. So are most viruses inheritable? Really, if your parents ever ...
4
votes
0answers
73 views

How long does it take for the COVID-19 antibody to disappear?

I saw a news article says; 90 days after the infection with ncov19, several patients had no detectable antibodies in their bloodstream. This seems to be one of their evidence that immunity against ...
4
votes
0answers
26 views

What is the relationship between susceptibility to subclinical secondary immune response and susceptibility to colonization?

Damien, Scheider, and Muller 1998 looks at susceptibility to secondary immune response in vaccinated and unvaccinated people. Is it reasonable to infer, from susceptibility to subclinical secondary ...