The population applied enzyme and virus mutation
and new population is created.
''Figures collected from laboratories around the world since April show no sign of virus mutation
that causes more serious illnesses; the vaccine in production will be effective against the virus,'' Chan said.
Was it the result of the harsh arrival of winter which led to increased proximity between humans and animals or a virus mutation
? Markos Kyprianou refused to give an opinion but did acknowledge the need for more epidemiologic and biological research.
Multiple experimental studies have better defined conditions for virus mutation
and the creation of reassortants.
A varicella-zoster virus mutation
identified in 1998 and thought to be a "serendipitous chance mutation" was isolated for a second time in 1999, this time in an elderly man presenting with severe facial lesions, reported Graham A.
''More species of bird flu virus found in pigs means higher chance for virus mutation
and for humans to be infected,'' Lo said.
The Commission's rationale is that the milder strains of avian flu can mutate into high pathogenic strains which can cause devastating epidemics: the newly-proposed legislation, therefore, will require EU member states to introduce and reinforce surveillance and control measures against the low pathogenic viruses, in order to prevent virus mutation
. On the question of financing, the Commission is proposing to co-finance measures on the low pathogenic strains by 30%.