Data from three studies indicate that fully vaccinated patients are able to stave off severe disease from the B.1.1.7, B.1.351, and P.1 variants.

Following vaccination, some women claim their periods have changed, leading to rumors about how the shots affect recipients’ reproductive systems, and even others’ by proxy.  

The European Medicines Agency emphasizes that the benefits of the jab in protecting against COVID-19 still far outweigh the risks.

Stanford University researchers determined the code from spare drops in discarded vials of the COVID-19 vaccine and published it on GitHub.

The vaccine was 79 percent effective at blocking symptomatic infections, according to data from a Phase 3 trial in the US, Chile, and Peru. A US safety oversight board says the data might be incomplete.

Two preliminary reports from the UK provide real-world evidence in support of the Pfizer/BioNTech and Oxford-AstraZeneca vaccines.

A preprint casts doubt on vaccine effectiveness in light of certain mutations in the 501Y.V2 variant that emerged from South Africa.

So far, there are three patients known to have been infected with SARS-CoV-2 twice, and in at least one case the second time around was asymptomatic.

The study, conducted in Malawi, Kenya, and Ghana, did not obtain informed consent from each parent whose child participated, but rather considered consent “implied” because of the particular experimental design.

The public health emergency has spurred a mass vaccination campaign.

Just half of respondents in Eastern Europe agree that vaccines are safe.

The World Health Organization and its partners will test the public health effect of immunization in parts of Malawi, Ghana, and Kenya.

The World Health Organization reports that a number of countries are experiencing “sizeable” numbers of the infection due to a failure to vaccinate.

Scientists debate why the number of whooping cough cases is up, and whether the effectiveness of a vaccine introduced within the last two decades is to blame.

The WHO reports more than 41,000 cases in the region in the first half of 2018.

Changsheng is found to have forged records for a rabies vaccine and is accused of distributing thousands of substandard DPT immunizations to be used in children.

The increase is associated with travel to Europe, where large outbreaks are occurring.

Infants whose moms received the shots when they were pregnant were no more at risk of dying or being hospitalized than other babies. 

The increase is attributed to a drop in immunization rates.