Lisa Taylor receives a COVID-19 vaccination at Research Centres of America in Hollywood. Reuters
"Preliminary projections make the availability of one or several vaccines seem possible by autumn 2020," the Robert Koch Institute said in a statement on its website, citing a global effort to bring immunisations to market.
"It would be dangerous at this point to trust that a vaccination from autumn 2020 can control the pandemic," it cautioned.
The impact of any vaccine could be limited because of viral mutations or because first products to market may offer only short-term immunity, the institute added.
German biotech firm BioNTech, which is working with US pharma giant Pfizer on a novel vaccine, on Tuesday reiterated it aimed to file for emergency authorisation or approval as early as October, if ongoing trials succeed.
Also that day, Russia became the world's first country to grant regulatory approval for a COVID-19 vaccine, without producing late-stage trial data, which raised concerns among several global health experts.
Health officials worldwide have expressed concerns in recent days that some countries grappling with the devastating economic impact of lockdowns may lift restrictions too swiftly, and that the coronavirus could spread during mass anti-racism protests.
The vaccine, called AZD1222, has been described by the World Health Organisation's chief scientist as the leading candidate in a global race to halt a pandemic that has claimed more than 600,000 lives.
None of the candidate vaccines in advanced clinical trials so far has demonstrated a "clear signal" of efficacy at the level of at least 50% sought by the WHO, spokeswoman Margaret Harris said.
Sheikha Latifa said on Instagram, “We were blessed today with a baby girl, Sheikha Bint Faisal Al Qasimi.”
Police in the western province of Makkah said the attacker was a Saudi, but it did not give the nationality of the guard, who they said had sustained minor injuries.
Christian Bolok, who was in his mid-30s, was trying to grab a rooster when one of its gaffs — small steel blades attached to a rooster's legs — cut a gaping wound on his left leg and hit his femoral artery, provincial Governor Edwin Ongchuan said.