This nonlinear model for the COVID-19 epidemic includes eight state variables (susceptible, exposed, infected, quarantined, hospitalized, recovered, deceased, and insusceptible populations). Two plausible scena
In this study of sperm parameters before and after 2 doses of a COVID-19 mRNA vaccine, there were no significant decreases in any sperm parameter among this small cohort of healthy men. Because the vaccines contain mRNA and not the live virus, it is unlikely that the vaccine would affect...
Trends in COVID-19 hospital outcomes in England before and after vaccine introduction, a cohort studyPeter D. Kirwan, Andre Charlett, Paul Birrell, Suzanne Elgohari, Russell Hope, Sema Mandal, Daniela De Angelis & Anne M. Presanis ...
Federal health officials are appealing to pregnant women to get vaccinated against COVID-19 and they're trying to make the case that the benefits of the vaccine outweigh the known or potential risks. As Mireya Villarreal reports, the resistance to get vaccinated has brought heartache ...
Surveys were used to assess sociodemographic factors, mental health, location, and deprivation index at the time of enrollment.3 Linear mixed models examined associations of COVID-19 vaccine, comorbidities, sociodemographic, and mental health factors with differences in observed and estimated post–COVID...
InMarket’s COVID-19 Behaviors Before & After Report explores changing consumer sentiments and shopping habits in response to the COVID-19 vaccine rollout. InMarket surveyed US based consumers during April 2021 to analyze how consumer feelings and perceptions about in-person shopping, where they ...
We defined two time periods to evaluate dengue vaccine intention over time. The first period was before COVID-19 vaccine availability in PR (May 2019 to December 14, 2020), defined as pre-COVID. The second period was after COVID-19 vaccine availability in PR and until the end of the st...
Until COVID-19, vaccines tended to be targeted at specific groups, such as children, the elderly or vulnerable people. And before the pandemic, the world produced around five billion total vaccine doses a year. Then everything changed: 11 billion doses of COVID vaccines were produced in 202...
It’s been two years since COVID-19 was declared a global pandemic. We look at life before the virus and discuss what’s likely to come after the pandemic ends.
On March 11, two months after work had begun on developing a vaccine, the US had only tested 4,900 people out of 327 million. The US has 4 percent of the world’s population, but now accounts for 28 percent of deaths from COVID-19 globally, becoming the new epicenter of the pandemic...