Update README.md

README.md

 # 2021-180 Smart Assistant to ease the process of COVID-19 and Pneumonia disease detection
 
-2021-180 Smart Assistant to ease the process of Covid-19 and Pneumonia disease detection
+2021-180 Smart Assistant to ease the process of Covid-19 and Pneumonia disease detection
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+
+**Main Objective**
+As a team, we propose a mobile application that assists patients to detect chest
+disease (covid-19, pneumonia) very quickly by just safely staying at home.
+As a solution for taking the risk of meeting the doctor at a hospital during a 
+global pandemic situation, spending extra money for PCR tests, etc.,
+
+**Main Research questions**
+Covid-19 has become the foremost lung-related disease now a days with the
+ongoing pandemic situation. Therefore, it has become vital to identify patients
+as soon as possible and to differentiate Covid-19 patients from other patients 
+with lung-related diseases like pneumonia. A major problem when doing this is 
+the time it takes for the results to come out from the existing testing methods.
+Even though methods that can generate faster results exist these methods are too
+expensive for third-world countries like Sri Lanka. Sometimes the accuracy of a 
+PCR test is in a low level compared to technologies like identifying covid-19 
+using CT scan. When it comes to the technical side it takes lots of time to the
+image uploading and processing part. Is one of the commonly found difficulties 
+in existing applications.
+Chest X-Rays are a cheap and faster method that is used to diagnose other
+lung-related diseases like Pneumonia, covid-19. This research will be focused
+on the possibility of using chest X-Rays to identify Covid-19 and differentiate
+them from other selected lung-related diseases.
+