Context: Bacteria can be grown in the laboratory on nutrient culture media, but viruses need living cells in which to replicate. Many vaccines to infectious diseases can be grown in fertilised chicken eggs. Millions of eggs are used each year to generate the annual flu vaccine requirements, a complex process that takes about six months after the decision is made as to what strains of virus to include in the new vaccine. A problem with using eggs for this purpose is that people with egg allergies are unable to be immunised, but this disadvantage may be overcome as new techniques for cell-based rather than egg-based culture become available. Cell-based culture will also be useful in a pandemic when it may be difficult to acquire a sufficiently large quantity of suitable sterile, fertile eggs.

Question: What are poultry eggs used for aside from consumption?
Answer: Many vaccines to infectious diseases can be grown in fertilised chicken eggs.

Question: What is the major difficulty faced in using poultry to cultivate vaccines?
Answer: egg allergies are unable to be immunised

Question: How long does it take for the flu vaccine to be fully ready for deployment into the population ?
Answer: process that takes about six months

Question: In order to make a vaccine , what do viruses require that bacteria does not?
Answer: viruses need living cells in which to replicate

Question: What new technology is being used in teh vaccine making process that will make vaccines safer and eaier for most consumers?
Answer: . Cell-based culture

Question: Why are poultry eggs useless aside from consumption?
Answer: Unanswerable

Question: Why is there no difficulty faced in using poultry to cultivate vaccines?
Answer: Unanswerable

Question: What do viruses need in order to replicate in the laboratory?
Answer: Unanswerable

Question: What is a simple process that takes about one month to prepare?
Answer: Unanswerable

Question: What food is least commonly associated with allergy?
Answer: Unanswerable