Working-age and young Latinos face disproportionately high COVID-19 death rates as states move toward reopening. Foreign-born Latinos who work essential or front-line jobs are especially in peril.

The big picture: A foreign-born Latino worker in California is 11.6 times more likely to died from COVID-19 than any other non-Hispanic U.S.-born group, according to a new USC study.

Iran on Saturday began enforcing tightened COVID restrictions nationwide as the number of coronavirus cases surged.

Driving the news: The country on Friday recorded 22,478 coronavirus cases, its highest single-day total, according to Al Jazeera. Health officials confirmed more than 19,660 cases on Saturday, as the surge in new infections follows last month's Iranian holiday celebrations.

Brazil is facing a "raging inferno of an outbreak," Bruce Aylward, senior adviser to the director general of the World Health Organization, warned Friday as the number of coronavirus cases and deaths across the country soars.

Driving the news: The surge, driven in part by relaxed mitigation measures and a more contagious local variant, has overwhelmed the country's health system. Brazil this week confirmed more than 4,000 COVID-19 deaths in a 24-hour period for the first time since the start of the pandemic.

Pfizer and BioNTech asked the Food and Drug Administration Friday to expand the emergency use authorization of its COVID vaccine to cover adolescents ages 12–15.

Why it matters: The authorization would broaden vaccination efforts and speed up the country's race to herd immunity, a goal that will ultimately require teenagers and children to be vaccinated as well.

Rochelle Walensky, director of the Centers for Disease Control and Prevention, on Thursday declared racism "a serious public health threat."

Driving the news: Walensky highlighted the disproportionate impact of the coronavirus pandemic on communities of color, pointing to case and death counts, as well as economic and social effects.

Brazil confirmed more than 4,000 COVID-19 deaths in a 24-hour period for the first time on Tuesday, the health ministry announced.

Why it matters: A surge in cases and deaths, driven in part by relaxed mitigation measures and a more contagious local variant, has overwhelmed the country's health system.

Nearly 80% of teachers, school staff and childcare workers had received at least one dose of the coronavirus vaccine by the end of March, the Centers for Disease Control and Prevention said Tuesday.

What they're saying: “Our push to ensure that teachers, school staff, and childcare workers were vaccinated during March has paid off and paved the way for safer in-person learning,” said CDC director Rochelle Walensky.

The Centers for Disease Control and Prevention is investigating an outbreak of salmonella in eight states that has sickened 19 people, the CDC confirmed in a statement Thursday.

Why it matters: The CDC notes that wild songbirds—such as pine siskins—can be common vectors for the spread of salmonella, and most of the people infected in this outbreak said they had been in contact with a wild bird prior to their illness or owned a bird feeder.

Around 56% of Hispanic renters said in March, before an U.S. eviction moratorium was extended, that they were otherwise likely to be forced to leave their homes in the next two months, per Census data.

Why it matters: Evictions contribute to a greater spread of COVID-19 as people experiencing homelessness end up in crowded infection-prone situations, according to studies, and coronavirus is already more easily spread among Latino families due to cramped living conditions and multigenerational homes.

America is in a race to vaccinate people before the country is overwhelmed by variants that are spurring a fourth wave of COVID-19.

Why it matters: Spring is here, and when cases were dropping, hope was rising for a more normal summer. But experts warn this will only happen if people keep social distancing, wearing masks and getting vaccinated as soon as they can.