Faced with limited Covid-19 vaccine supplies, many countries chose to delay the administration of the second doses. Here’s the science behind the delay and timing of the jabs.
The World Health Organization also said there was a "likely causal association" between coronavirus vaccines using mRNA technology and "very rare" heart inflammations.
The World Health Organization has said that any Covid-19 vaccines it has authorised for emergency use should be recognised by countries as they open up their borders to inoculated travellers.
BioNTech says it hasn't seen any data that would indicate a heightened risk of heart inflammation after Israel announced investigating cases in people who received Pfizer vaccine.
While vaccine makers have voiced broad commitment to cooperating to boost production, industry representatives have insisted that intellectual property waivers and forced technology sharing was the wrong way to go.
Alaska's governor says his plan will provide $150 million in relief the the state's tourism industry, that also includes a free jab for tourists.
Finnish nurse's method to reduce medical waste and increase the number of jabs per Covid-19 vaccination bottle may also help other EU countries who are currently struggling with delays.
Some countries have opened doors for the private sector to get in on the vaccine drive.
The Kingdom's National Committee for Infectious Diseases uses a scientific process to approve vaccines based on safety and efficacy results of clinical studies and other data provided by manufacturers.
The trial will examine the immune responses to an initial dose of Pfizer-BioNTech vaccine followed by a booster of Oxford-AstraZeneca’s, as well as vice versa, with intervals of four and 12 weeks.
Australia, which until Sunday had gone two weeks without any locally acquired cases of Covid-19, is expected to begin administering vaccines this month.
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