Synopsis In a paper based on the CNNS survey published in June 2021 in the medical journal, The Lancet, the authors had stated that “datasets, including those from India in field settings, indicate a higher haemoglobin estimate (up to 0·6–0·9 g/dL) in venous blood than in capillary samples.” PTI (This story originally appeared in on Aug 03, 2021)The prevalence of anaemia could fall by almost 21 percentage points in children and over 28 percentage points in non-pregnant women depending on the method and site of blood collection. This was stated in a study published recently in the journal BMJ Global. These findings call the global estimates of anaemia prevalence, which have been predominantly generated using capillary (or fingertip) measurements, into doubt, stated the study.