Coronavirus disease (COVID-19) is an infectious disease caused by a newly discovered coronavirus. Most people infected with the COVID-19 virus will experience mild to moderate respiratory illness and recover without requiring special treatment. Older people, and those with underlying medical problems like cardiovascular disease, diabetes, chronic respiratory disease, and cancer are more likely to develop serious illness. The best way to prevent and slow down transmission is to be well informed about the COVID-19 virus, the disease it causes, and how it spreads. Protect yourself and others from infection by washing your hands or using an alcohol-based rub frequently and not touching your face.

1. Coronavirus
COVID-19
Student Name:
Alkolbee Alaa Radhi Muhssin

2. Content
• What is corona virus ?
• How coronaviruses transmission?
• Signs and Symptoms of this disease ?
• How to protect yourself ? Tips to prevent the virus?
• Reference .

3. Coronavirus disease 2019
• Coronavirus disease 2019 (COVID-19) is an
infectious disease caused by severe acute
respiratory syndrome coronavirus 2 (SARS-
CoV-2). [1]
• It was first identified in December 2019 in
Wuhan, China, and has since spread globally.
• Epidemiological studies estimate each infection
results in 1.4 to 3.9 new ones when no members
of the community are immune and no
preventive measures taken. The virus primarily
spreads between people through close contact
and via respiratory droplets produced from
coughs or sneezes.[2][3]
Transmission electron micrograph of SARS-CoV-2 virions with
visible coronae
Digitally colourised scanning electron micrographs of SARS-CoV-2 virions
(yellow) emerging from human cells cultured in a laboratory

4. How it Transmission?
• The disease is spread during close contact,
often by small droplets produced during
coughing, sneezing, or talking.[4][5] During
close contact, (1 to 2 metres, 3 to 6 feet),
• people catch the disease after breathing in
contaminated droplets that were exhaled by
infected people.
• Also infected happens by touch contaminated
surfaces and then their eyes, nose or mouth
with unwashed hands.[4] On surfaces the
amount of active virus decreases over time
until it can no longer cause infection.[5] Respiratory droplets produced when a man sneezes, visualised
using Tyndall scattering

5. Signs and symptoms
Symptom Range
Fever 83-99%
Cough 59-82%
Loss of appetite 40-84%
Fatigue 44-70%
Shortness of breath 31-40%
Coughing up sputum 28-33%
Muscle aches and pains 11-35%

6. How to protect yourself ?

7. Reference
1) "WHO Director-General's opening remarks at the media briefing on COVID-19—11 March 2020". World Health Organization. 11 March 2020. Retrieved 11 March 2020.
2) "Q&A on coronaviruses (COVID-19)". World Health Organization (WHO). 11 February 2020. Archived from the original on 20 January 2020. Retrieved 24 February 2020.
3) ^ Jump up to:a b "How COVID-19 Spreads". U.S. Centers for Disease Control and Prevention (CDC). 27 January 2020. Archived from the original on 28 January 2020. Retrieved 29 January 2020.
4) "Q&A on coronaviruses". World Health Organization. 8 April 2020. Archived from the original on 20 January 2020. Retrieved 30 April 2020
5) "Q & A on COVID-19". European Centre for Disease Prevention and Control. Retrieved 30 April 2020.
6) "Interim Clinical Guidance for Management of Patients with Confirmed Coronavirus Disease (COVID-19)". Centers for Disease Control and Prevention. 6 April 2020. Archived from the original on 2
March 2020. Retrieved 19 April 2020.
7) "Clinical course and outcomes of critically ill patients with SARS-CoV-2 pneumonia in Wuhan, China: a single-centered, retrospective, observational study". Lancet. 8 (5): 475–481.
doi:10.1016/S2213-2600(20)30079-5. PMC 7102538. PMID 32105632. . . 52 critically ill adult patients ... fever (98%) ... [of which] fever was not detected at the onset of illness in six (11·5%) ...
8) Chen N, Zhou M, Dong X, Qu J, Gong F, Han Y, Qiu Y, Wang J, Liu Y, Wei Y, Xia J, Yu T, Zhang X, Zhang L (February 2020). "Epidemiological and clinical characteristics of 99 cases of 2019
novel coronavirus pneumonia in Wuhan, China: a descriptive study". Lancet. 395 (10223): 507–513. doi:10.1016/S0140-6736(20)30211-7. PMC 7135076. PMID 32007143.
9) "Symptoms of Coronavirus". U.S. Centers for Disease Control and Prevention (CDC). 20 March 2020. Archived from the original on 30 January 2020..
10) Wei, Xiao-Shan; Wang, Xuan; Niu, Yi-Ran; Ye, Lin-Lin; Peng, Wen-Bei; Wang, Zi-Hao; Yang, Wei-Bing; Yang, Bo-Han; Zhang, Jian-Chu; Ma, Wan-Li; Wang, Xiao-Rong; Zhou, Qiong (26 February
2020). "Clinical Characteristics of SARS-CoV-2 Infected Pneumonia with Diarrhea". doi:10.2139/ssrn.3546120.
11) ^ Jump up to:a b c Huang C, Wang Y, Li X, Ren L, Zhao J, Hu Y, et al. (February 2020). "Clinical features of patients infected with 2019 novel coronavirus in Wuhan, China". Lancet. 395 (10223): 497–
506. doi:10.1016/S0140-6736(20)30183-5. PMC 7159299. PMID 31986264.
12) ^ Lai, Chih-Cheng; Shih, Tzu-Ping; Ko, Wen-Chien; Tang, Hung-Jen; Hsueh, Po-Ren (1 March 2020). "Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and coronavirus disease-2019
(COVID-19): The epidemic and the challenges". International Journal of Antimicrobial Agents. 55 (3): 105924. doi:10.1016/j.ijantimicag.2020.105924. ISSN 0924-
8579. PMC 7127800. PMID 32081636.
13) Report of the WHO-China Joint Mission on Coronavirus Disease 2019 (COVID-19) (PDF) (Report). World Health Organization (WHO). 16–24 February 2020. Archived (PDF) from the original on 29
February 2020. Retrieved 21 March 2020.
14) ^ Jump up to:a b Zheng YY, Ma YT, Zhang JY, Xie X (March 2020). "COVID-19 and the cardiovascular system". Nature Reviews. Cardiology. 17(5): 259–260. doi:10.1038/s41569-020-0360-
5. PMC 7095524. PMID 32139904.
15) Nussbaumer-Streit, B; Mayr, V; Dobrescu, AI; Chapman, A; Persad, E; Klerings, I; Wagner, G; Siebert, U; Christof, C; Zachariah, C; Gartlehner, G (8 April 2020). "Quarantine alone or in
combination with other public health measures to control COVID-19: a rapid review". The Cochrane Database of Systematic Reviews. 4:
CD013574. doi:10.1002/14651858.CD013574. PMC 7141753. PMID 32267544.

8. Thank you