Israeli doctors find severe COVID-19 breakthrough cases mostly in older

Doctors are learning which vaccinated patients are most vulnerable to severe illness, amid growing concerns about instances in which the shots provide less protection against the worst forms of the disease.

Around half of the country’s 600 patients presently hospitalized with severe illness have received two doses of the Pfizer Inc. shot, a rare occurrence out of 5.4 million fully vaccinated people.

The majority of these patients received two vaccine doses at least five months ago, are over the age of 60 and also have chronic illnesses known to exacerbate a coronavirus infection. They range from diabetes to heart disease and lung ailments, as well as cancers and inflammatory diseases that are treated with immune-system suppressing drugs, according to Reuters interviews with 11 doctors, health specialists and officials.