Passerby.

The abject (the down and out), a visual tax on passersby and an economic tax on society, are easy and convenient to ignore. Homelessness, often, escapes the attention of institutions designed to address it. It is the duty of health providers to help society and policymakers to acknowledge the context and factors that beget ill health.

Correction: Macrophage Colony Stimulating Factor Derived from CD4+ T Cells Contributes to Control of a Blood-Borne Infection.

[This corrects the article DOI: 10.1371/journal.ppat.

Macrophage Colony Stimulating Factor Derived from CD4+ T Cells Contributes to Control of a Blood-Borne Infection.

Dynamic regulation of leukocyte population size and activation state is crucial for an effective immune response. In malaria, Plasmodium parasites elicit robust host expansion of macrophages and monocytes, but the underlying mechanisms remain unclear. Here we show that myeloid expansion during P.

A Novel Model of Asymptomatic Plasmodium Parasitemia That Recapitulates Elements of the Human Immune Response to Chronic Infection.

In humans, immunity to Plasmodium sp. generally takes the form of protection from symptomatic malaria (i.e.