This diseases is highly infectious.it was first identified in December 2019 in wuhan,China, gradually,it spread almost all the countries of the world.As a result, millions of people were infected and many died.Bangladesh is also seriously affected with coronavirus.many people died of this disease.some common symptoms of this diseases are fever,cough,muscle pain, tiredness and difficulty in breathing.however,there may be asymptomatic coronavirus infection,too.the coronavirus can enter ahuman body very easily through mouth,nose or eyes.when an infected person sneezes,cough or exhales ,the virus may come out.if a healthy person comes in contact with the virus,he or she may be infected,he or she must be kept isolated.