Does the 4th booster protect against the Omicron variant of COVID-19? Conclusions The findings suggest that compared with a third dose of mRNA covid-19 vaccine, a fourth dose improved protection against infection, symptomatic infection, and severe outcomes among long term care residents during an omicron dominant period.
Does Novavax use mRNA? Called Novavax, it’s a more traditional vaccine that uses moth cells and tree bark. Instead of an mRNA vaccine (Pfizer, Moderna) or a viral vector vaccine (Johnson & Johnson), Novavax is a subunit protein vaccine.
Do you still need a vaccine to go on a cruise? The CDC dropped its cruise covid-19 reporting program last month, prompting cruise lines to announce they would loosen testing requirements for vaccinated passengers and — in most cases — allow large numbers of guests who have not been vaccinated, as long as they showed proof of a negative tests.
What cruise lines require vaccinations? Royal Caribbean and Celebrity require testing for unvaccinated passengers but only require vaccinated people to test on sailings that are six nights or longer. Carnival, MSC Cruises and Silversea Cruises have made similar changes since the CDC ended its COVID-19 Program for Cruise Ships.