Answer: The flu can be caused due to an unpredictable virus that can cause mild illness in most of the people.
It is vulnerable to all the age groups including pregnant women, older people, and to the people having having some other medical conditions.
The people who are more prone to diseases like bronchitis or pneumonia should take vaccine to prevent themselves from these kind of flu.
The people who are above 65 years of age, or who are pregnant are eligible for the vaccine that is free and provided at the center of the NHS.
These vaccines are very helpful to the people prone to diseases.
