Factbox: Latest on the worldwide spread of the coronavirus Britain said on Thursday that there were lumps and bumps in the global vaccine supply chain that were causing slower than expected deliveries and scolded the European Union for threatening to slap a ban on vaccine exports. Reuters Staff U.S.

(Reuters) - Britain said on Thursday that there were lumps and bumps in the global vaccine supply chain that were causing slower than expected deliveries and scolded the European Union for threatening to slap a ban on vaccine exports.

...a number of people ...are reporting that the post-Covid symptoms they’ve experienced for months have begun improving, sometimes significantly, after they got the vaccine. It’s a phenomenon that doctors and scientists are watching closely, but as with much about the yearlong coronavirus pandemic, there are many uncertainties.

Messonnier: We can't stretch vaccine doses unless we know it works “We have to stick with what we know works,” Nancy Messonnier of the CDC told @HelenBranswell during a live virtual conversation today. Andrew Joseph STAT

In an effort to stretch the supply of Covid-19 vaccines, some have advocated for further spacing out the two doses required for some of the shots or, in the case of the Moderna vaccine, lowering the dosage given with each jab.

https://www.nytimes.com/live/2021/03/17/world/covid-19-coronavirus#to-save-the-summer-tourist-season-travel-certificates-are-proposed-in-europe

The European Union proposed a Covid-19 certificate on Wednesday that would allow people to travel more freely, a move aimed at saving the summer tourist season for member states that depend on it economically.

The proposed document, known as a Digital Green Certificate, would allow residents of member nations to travel at will within the bloc if they have proof of Covid-19 vaccination, a negative test result or a documented recovery from the coronavirus.

The certificates would be free and would be available in digital or paper format.

“The Digital Green Certificate will not be a precondition to free movement, and it will not discriminate in any way,” said Didier Reynders, the bloc’s top official for justice, adding that the aim was to “gradually restore free movement within the E.U. and avoid fragmentation.”

Vaccine passports pose ethical thicket for Biden administration The White House says the government shouldn't issue the credentials or store the data. Darius Tahir POLITICO

States, airlines and tech companies are pressuring the Biden administration to develop a federal standard for vaccine passports — a policy that could speed the economic recovery but might also discriminate against disadvantaged groups and jeopardize privacy.

WHO statement on AstraZeneca COVID-19 vaccine safety signals