Pandemic roundup: why Covid can cause stillbirths; peer-to-peer mental health services for farmers; nearly 1 in 5 health-care workers have quit since the beginning of the pandemic

Here's a roundup of recent news stories about the pandemic and vaccination efforts:

It's already well established that stillbirths have increased in many areas with high Covid-19 rates. Now a new study suggests why: A coronavirus infection can invade and destroy the placenta, likely leading to stillbirths, the study says. Read more here.

Nearly a fifth of American health-care workers have quit since the beginning of the pandemic as they get increasingly burned out by the demands of overcrowded hospitals. A portrait of a Minnesota hospital shows what that stress looks like. Read more here.

Worker burnout is only one reason hospitals can't handle the new normal, says one analysis. Rural hospitals especially will continue to lose out: Urban hospitals with deeper pockets will keep poaching rural staff (example: traveling nurses), enabling lucrative elective surgeries. Smaller hospitals will continue to shoulder a disproportionate share of mild-to-moderate Covid-19 patients and will be more likely to have to pause elective surgeries and other non-Covid care. Read more here.

During the Delta variant surge last summer, rural counties with low vaccinations rates were hit the hardest, researchers found. Counties where the coronavirus vaccination rate was below 30% saw nearly double the case rate of counties where vaccination rates were over 50%. Read more here.

The pandemic has increased farmers' need for mental-health services, but many are reluctant to admit they need help. Programs that teach peer-to-peer counseling can be especially effective, but those and other programs may need more funding to remain sustainable. Read more here.

In January, more than 3,000 hospitalized patients became infected with the coronavirus during their stay, more than in any other month of the pandemic, new data show. Read more here.

The Food and Drug Administration delayed its review of Pfizer's coronavirus vaccine for children under 5 years old earlier this month. Sources familiar with the decision now say it's because a few children in the study got breakthrough infections of the Omicron variant after two doses of the vaccine. Since so few people get breakthrough infections, even a handful could be statistically significant. FDA officials and Pfizer agreed it would be better to wait for a larger sample size to assess the vaccine's effectiveness for that age group with both two doses and three doses. Results are expected in early April. Read more here.