Which of the following pathogens is the most common causative agent for viral croup?

By what age should a child normally be able to ride a tricycle with pedals?

Risk factors for otitis externa include which of the following?

On examination of a 4-day-old healthy infant you note the presence of fine pinpoint white spots over the bridge of the nose, chin and cheeks. Which of the following conditions is the most likely diagnosis for this patient?

By what age should a child normally be able to feed self?

How can a doctor measure progression of AIDS in a patient infected with HIV-1?

In LCMV infection in lab mice, a single Y to F substitution in the epitope KAVYNFATM leads to a 100-fold reduction in affinity with the dominant T cell receptor. What is the consequence of this?

If there is a positive correlation between root-to-tip divergence distance and the sampling date of sequences in a phylogeny, what can we conclude?

What do we call the rate at which novel mutations arise (per site or per genome) per genome replication event?

Which statement about protozoa is correct?