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Wheat is the main cereal crop worldwide and about 2 billion people suffer from Zn and Fe deficiency because of their dependence just on cereal crops. Three Billion people are malnourished suffering from mild to severe physical and mental disabilities. Vast genetic diversity of Wheat exists in nature that differs in their mineral compositions. Main deficient micronutrients are Provitamin-A, Zn & Fe which deficiencies cause serious physical and mental abnormalities. Different methods of enhancing mineral contents of plants products have been used, out of which biofortification has proved more promising and economical. Bacterial phytoene synthase gene (crtb) and carotene desaturase gene (crti) has been transferred in wheat that has increased carotenoid content but darker colour has less public acceptance.GPC-B1 gene is found to be associated with increase micronutrients but it lowers the overall yield of the plant. Several new methodologies such as oligo-directed mutagenesis, reverse breeding, RNA directed DNA methylation and genome editing have been used for increasing micronutrient composition and their bioavailability. But the combination of Plant Breeding methods with Molecular Techniques will be more useful for advancement in this field.

Up to now, no vaccine has been developed for COVID-19 treatment. Although many scientists are working for the rapid development of a vaccine to control this pandemic, nonetheless, it will take time. If the vaccine will be developed soon, it will not be available to the entire world instantly since the mass production of the vaccine will take time. In this scenario, we will have to take alternative measures to control the COVID-19 pandemic. These alternative approaches include the stimulation of the immune system to fight against viral infections. Among the different approaches to strengthen the immune system, the use of probiotics is the best one. Probiotics can help the body to fight against COVID-19 directly and indirectly. In this review, we comprehensively discuss the use of probiotics for the prevention and control of COVID-19.

The emerging Corona virus strain (severe acute respiratory syndrome corona virus-2 (SARS-CoV-2)) harbors intricate in the development of corona virus infection (COVID-19)-induced pneumonia and subsequently ameliorates lung infection. Genome sequence and interventions reveal proximal resemblance of corona virus strain COVID-19 with severe acute respiratory syndrome (SARS), transmittable to bats, suggesting similar primary hosts in the spread of infection. However, potential rapid human-to-human transmission has caused therapeutic challenges in treating a wide range of humans suffering from corona virus all over the world. However, up to now, no direct vaccines or antiviral drugs are available to treat COVID-19. Previously designed antiviral drugs and convalescent plasma are undergoing investigations as treatment for COVID-19 infected patients. Therapeutic challenges with regards to COVID-19 have prompted scientists to develop fruitful remedies to combat the pathogen. In this review, we address the role of current ongoing therapeutic strategies, , and complex mechanisms of adaptive immune system (B and T cells) to respond to viruses. Furthermore, we illustrate the current challenges in the treatment of COVID-19, managerial strategies, and ongoing and future perspectives.

The objective of the study was to assess the post-weaning growth response of Sahiwal calves reared on four different preweaning dietary regimens. The four diets were: (a) whole cow's milk, starter ration (SR; CP 5 20%, total digestible nutrients (TDN) 5 72%) and Berseem hay (H; Egyptian clover; CP 5 21%, TDN 5 63%); (b) whole cow's milk 1 H; (c) milk replacer (MR; reconstituted to supplier specification; Sprayfo R ) 1 SR 1 H; and (d) MR 1 H. The protein and fat percentages of reconstituted MR were 2.22 and 1.84, respectively. Milk or MR were fed at the rate of 10% of the calves' body weight (BW) until 56 days of age, and then withdrawn gradually until weaned completely by 84 days of age. The average initial BW of calves in groups A, B, C and D were 56.3 6 1.0, 47.5 6 1.0, 40.4 6 1.0 and 30.3 6 1.0 kg, respectively. Initially, there were 12 calves in each group with six of each sex; however, one male calf died from each of groups B and C and were not replaced. During the post-weaning period, 13 to 24 weeks, the calves were fed a single total mixed ration ad libitum based on maize, canola meal, wheat straw and molasses containing 16% CP and 70% TDN. Daily feed intake and weekly BW gains were recorded. The data were analyzed by MIXED model analysis procedures using the statistical program SAS. The intake of calves as percent of their BW, feed conversion ratio and cost per kg of BW gain were not different (P . 0.05) across treatments. The daily gain at 24 weeks of age for the pre-weaning treatments A, B, C and D were 746 6 33, 660 6 33, 654 6 33 and 527 6 33 g/day and the final liveweights of calves were 119 6 4.2, 102 6 4.2, 95 6 4.2 and 75 6 4.2 kg, respectively. Gains were influenced significantly (P , 0.05) by pre-weaning treatments. The calves fed MR and H only during the pre-weaning period were unable to catch up post weaning with calves on other dietary treatments. The calves fed whole milk from birth at the rate of 10% of liveweight together with concentrates had higher weaning weight and superior growth rate post weaning as well. Thus, pre-weaning feeding was important for higher weaning weights and superior growth rates post weaning.