An individual receives a flu vaccine and is well protected for the current flu season. the following flu season, the individual fails to get another flu vaccine and comes down with the flu. what is the most likely explanation for vaccine ineffectiveness in the subsequent flu season

Witch system has the main function of the body defense

Which of the following processes within viral replication is the greatest source of genetic variation in rna virus populations? a) high mutation rate due to lack of proofreading of rna genome replication errors.b) transcription from the host cell rna polymerase introduces numerous mutations.c) capsid proteins from the host cell can replace the viral capsid.d) viral rna is translated by host cell ribosomes.

What can you do to support your own mental health and physical health?