Objectives:
Does probiotic supplementation improve outcomes of preterm infants in India?

Study design:
This review article included 9 RCTs with a total of 1,514 preterm infants.

Results and conclusions:
The investigators found in 9 RCTs that probiotics supplementation significantly reduced risk of necrotizing enterocolitis (NEC) ≥ Stage II with 64% [risk ratio = 0.36, 95% CI = 0.20 to 0.66, p = 0.0009].

Scientific studies (review articles) on COVID-19 virus:

2022:

Objectives:
What are the risk factors of COVID-19 or SARS-CoV-2 infection?

Study design:
This review article included 10 studies involving a total of 3,403 hospitalized patients with COVID-19 infection.

No publication bias was found in studies.

Results and conclusions:
The investigators found according to the meta-analysis, the pooled prevalence of hypertension in people infected with SARS-CoV-2 was 16.37% [95% CI = 10.15% to 23.65%, I2 = 86.42%].

Objectives:
Is there a causal relationship between dietary anthocyanins and reduced levels of systemic and vascular inflammation?

Objectives:
Results regarding the association between fish intake and risk of metabolic syndrome (MetS) are ambiguous. Therefore, this review article has been conducted.

Objectives:
Respiratory protective devices are critical in protecting against infection in health care workers at high risk of novel 2019 coronavirus disease (COVID-19). However, recommendations are conflicting and epidemiological data on their relative effectiveness against COVID-19 are limited. Therefore, this review article has been conducted.

What are the risk factors of COVID-19 or SARS-CoV-2 infection?

Study design:
This review article included 6 studies with a total of 1,558 patients.

Objectives:
Does influenza vaccination during pregnancy improve child health outcomes?

Study design:
This review article included 15 observational studies and 4 primary RCTs.

Objectives:
Epidemiologic studies of the relationship between nitrite or nitrate consumption and risk of non-Hodgkin lymphoma (NHL) remain controversial. Therefore, this review article has been conducted.

Objectives:
Does tea consumption decrease risk of cardiovascular disease and all-cause mortality among adults?
 
Study design:
This review article included 39 prospective cohort studies.

Strength of evidence was rated as low and moderate (depending on study population age group) for cardiovascular disease-specific mortality outcome and was rated as low for cardiovascular disease events, stroke and all-cause mortality outcomes.

Objectives:
Anemia is the most common hematologic disorder of children in the globe. There are fragmented and inconclusive study findings on under-five anemia in Ethiopia. Understanding the distribution of anemia is an important step for program planners and policymakers. Therefore, this review article has been conducted.

What are the risk factors of under-five anemia in Ethiopia?

Study design:
This review article included 16 cross-sectional studies, published from 2013 to 2018 with a total of 11,924 under-five children.