a lifetimeis it for you hepatitis b is a deadly viral infection which damages the liver causing it to fail develop cirrhosis or cancer even leading to death in extreme cases the virus spreads from one person to another through direct contact with bodily fluids such as infected blood urine and semen unprotected oral sex and intercourse and contaminated needles and blades dr ballani says it is recommended for all children and adults in the high risk group and especially those who deal with human tissue on a regular basis such as doctors surgeons dentists and garbage collectorsflu how it works do you wonder why you get infected with the flu virus with every change in season and why doesnt the body develop antibodies to fight the virus the reason is that there is no one kind of virus that is responsible for causing flu secondly flu viruses have the ability to mutate into another form with every change in season therefore a vaccine which was successful in providing protection in a particular season will not necessarily work the next time around so a new vaccine has to be developed to combat the specific virus mutation for that seasonis it for you the flu virus enters the body through mucus membranes in the respiratory tract it can spread through coughs and sneezes or through direct contact with an infected person such as by kissing and touching vaccination against flu is waste of money for people with effective immune systems dr ballani says only people with specific conditions such as chronic obstructive pulmonary disease copd weakened immune response due to hiv weakened lungs due to bronchitis and heavy smoking should go for a flu vaccinationhepatitis a how it works hepatitis a is a highly contagious liver infection caused by one of several hepatitis viruses it spreads through infected faeces and contaminated food and water the virus has the ability to survive on hands and in food kept at room temperature for prolonged hours the vaccine is given in two shots over six monthsis it for you the vaccine is recommended for those who work and travel in extremely crowded areas dr balsekar says a city like mumbai where people travel four to five hours every day in cramped buses and trains is the perfect breeding ground for the hepatitis a virus i would advise everyone to get vaccinated against it