Amid the pandemic, doctors and experts are advising people of all ages to take a flu shot as a primary protection against other respiratory viral illnesses like common seasonal flu and H1N1 — some of which can cause pneumonia and make people vulnerable to coronavirus. A flu shot, emphasise experts, will work to reduce illnesses that often have similar symptoms.Amid the pandemic, doctors and experts are advising people of all ages to take a flu shot as a primary protection against other respiratory viral illnesses like common seasonal flu and H1N1 — some of which can cause pneumonia and make people vulnerable to coronavirus. A flu shot, emphasise experts, will work to reduce illnesses that often have similar symptoms.