Moderna CEO says vaccines likely less effective against Omicron
Vaccine resistance could lead to more sickness and hospitalisations and prolong the pandemic.
Tue Nov 30 2021
What you need to know about the coronavirus right now
Tests show Chinese shots less effective on Delta variant.
Fri Jun 25 2021
Pfizer jab less effective, still protects against Indian strain: Study
The study shows that "this variant.. has acquired partial resistance to antibodies."
Sun May 30 2021
CanSinoBIO says COVID-19 shot may be less effective over time, booster shot promising
A second shot given to trial participants six months after their first injection could offer substantial protection.
Thu Apr 01 2021
Oxford/AstraZeneca COVID shot less effective against South African variant: study
In the small phase I/II trial, early data shows limited efficacy against mild disease primarily due to the B.1.351 South African variant.
Sun Feb 07 2021
COVID: Sarawak to tighten controls in longhouses, villages - Uggah
At present, the control was seen to be less effective due to an insufficient number of enforcement personnel stationed in the affected areas.
Fri Feb 05 2021
COVID-19: Depression and stress could hamper immune response to vaccines
COVID-19 vaccines could be less effective in those suffering the most from stress, and whose immune systems may be weakened.
Fri Jan 15 2021
CDC whistleblower claims agency has been using wrong Zika test
That test is substantially less effective than another established test, he said, and misses nearly 40 percent of Zika infections.
Thu Sep 29 2016
If you're on the pill and weigh more than 75 kilograms, read this
Research is raising new concerns that the 'morning-after' pill is less effective in women who weigh more than 75 kilograms.
Tue Jul 26 2016
Flu vaccine more effective for women than men: study
The flu vaccine is generally less effective for men than for women, scientists said in a study, tracing the effect to higher levels of testosterone that curb the immune response.
Wed Dec 25 2013