Shanghai is tightening an already strict COVID-19 lockdown in a fresh push to eliminate infections outside quarantined areas of China’s biggest city by late this month, people familiar with the matter said.

Valneva said on May 4 the French drugmaker will conduct a trial about the use of the company’s COVID-19 vaccine candidate VLA2001 as a booster jab following a mRNA vaccination or natural infection.

COVID-19 cases in the Americas increased by 12.7 percent last week from the prior week, the Pan American Health Organization (PAHO) said on May 4, as infections continued to rise in Central and North America.

The U.S. Food and Drug Administration approved Phathom Pharmaceuticals Inc.’s Voquezna Triple Pak (vonoprazan tablets, amoxicillin capsules, clarithromycin tablets) and Voquezna Dual Pak (vonoprazan tablets, amoxicillin capsules) for the treatment of Helicobacter pylori infection in adults.

Pfizer Inc. on April 29 said a large trial found that the company’s COVID-19 oral antiviral treatment Paxlovid was not effective at preventing coronavirus infection in people living with someone infected with the virus.

Following the record surge in COVID-19 cases during the Omicron-driven wave, some 58 percent of the U.S. population overall and more than 75 percent of younger children have been infected with the coronavirus since the start of the pandemic, according to a U.S. nationwide blood survey released on April 26.

The head of the World Health Organization on April 26 urged countries to maintain surveillance of coronavirus infections, saying the world was “blind” to how the virus is spreading because of falling testing rates.

AstraZeneca’s Phase III Provent trial results showed a statistically significant 77 percent decrease in a patient’s likelihood of developing symptomatic COVID-19 when proactively treated with Evusheld. Additionally, results were announced by Clover Biopharmaceuticals for the Phase II/III Spectra global study investigating the efficacy of the SCB-2019 (CpG 1018/Alum) vaccine booster in patients that have previously developed a COVID-19 infection.

Unvaccinated people infected with the Omicron variant are unlikely to develop immune responses that will protect them against other variants of the coronavirus, a new study suggests. Additionally, the average number of global deaths from COVID-19 were 6 percent higher on weekends compared to weekdays throughout the pandemic, according to statistics reported to the World Health Organization between March 2020 and March 2022.

India’s tally of daily COVID-19 cases nearly doubled on April 18 from the previous day to more than 2,000 for the first time in a month, government data showed, and the southern state of Kerala reported a big jump in deaths.