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1. Of or relating to contagion.
2. Transmissible by direct or indirect contact; communicable: a contagious disease.
3. Capable of transmitting a disease: stayed at home until he was no longer contagious.
4. Spreading or tending to spread from one to another; infectious: a contagious smile.

con·ta′gious·ly adv.
con·ta′gious·ness n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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Its contagiousness was established as early as the eleventh century AD and the bacterium that causes it was isolated by Robert Koch in 1882.2 The strains that are resistant to the two main first line anti TB drugs that form the back bone of short course chemotherapy, isoniazid and rifampicin are known as multi drug resistance tuberculosis (MDR-TB).
The entire family must be treated because of contagiousness and reinfection.
Rather, research shows the contagiousness of both positivity and negativity.
Vaccines keep within bounds the diseases' severity, reduce complications and decrease contagiousness.
Results from daily recorded exercise patterns showed that exercise behavior is socially contagious and that the level of its contagiousness varied based on relative activity levels and gender relationships between friends.
A new mass shooting gets its incentive from similar, recent mass shootings, and this contagiousness lasts for 13 days, according to a 2015 study by five researchers, including Sherry Towers, a mathematician and statistician at Arizona State University.
The basic reproduction number ([R.sub.0]), pronounced "R naught," is intended to be an indicator of the contagiousness or transmissibility of infectious and parasitic agents.
(95) The officials also argued that the KGB's prophylactic chats "have, as a rule, positively influenced not only those subjected to profilaktika but their milieu." (96) Profilaktika may even have been the KGB's ideal tactic in containing the Kaunas events: the influence of self-immolations (and apparent contagiousness of unrest) was recently demonstrated by the case of Mohamed Bouazizi, a Tunisian street vendor whose 2011 suicide marked the beginning of the Arab Spring.
Knowledge level was measured by adding up the number of signs and symptoms identified by participants (Cronbach's alph = .97).Additionally, four items assessed participant level of agreement with statements related to effectiveness of treatment, contagiousness, and level of effect on one's life related to mental illness, and the concept of being mentally ill equating to being 'crazy' (strongly agree-strongly disagree).
The plague inevitably put pressure upon traditional beliefs regarding health, the contagiousness of disease, the connections between spiritual and corporeal well-being, God's capacity for retribution against the sinful, and the efficacy of spiritual redemption in the face of bodily corruption.
And as polite as it might be to shield your mouth, it's futile as the contagiousness isn't prompted by just one facial feature.
She felt that QI was contributing to the stigmatization of TB, fanning public fears about the contagiousness of TB.