By Nancy Lapid

(Reuters) – The next is a abstract of some current research on COVID-19. They embody analysis that warrants additional research to corroborate the findings and that has but to be licensed by peer overview.

Experimental chewing gum reduces virus in saliva

An experimental chewing gum containing a protein that “traps” coronavirus particles might restrict the quantity of virus in saliva and assist curb transmission when contaminated persons are speaking, respiration or coughing, researchers consider. The gum comprises copies of the ACE2 protein discovered on cell surfaces, which the virus makes use of as a gateway to interrupt into cells and infect them. In test-tube experiments utilizing saliva and swab samples from contaminated people, virus particles connected themselves to the ACE2 “receptors” within the chewing gum. Consequently, the viral load within the samples fell by greater than 95%, the analysis group from the College of Pennsylvania reported in Molecular Remedy. The gum feels and tastes like typical chewing gum, could be saved for years at regular temperatures, and chewing it doesn’t harm the ACE2 protein molecules, the researchers mentioned. Utilizing gum to cut back viral masses in saliva , they counsel, would add to the advantage of vaccines and could be notably helpful in nations the place vaccines should not but accessible or reasonably priced.

Safety could last more after vaccine booster dose

Safety in opposition to COVID-19 from an mRNA vaccine – both the Moderna (NASDAQ:) or Pfizer/BioNTech pictures – could last more after the booster dose than after the unique two-shot routine, researchers speculated based mostly on the outcomes of a small new research. They measured vaccine responses earlier than and after the boosters in 33 wholesome middle-aged adults who had obtained their second doses a mean of 9 months earlier. Earlier than the boosters, their antibody ranges had decreased about 10-fold from ranges early after their second dose. By 6 to 10 days after the booster, their antibody ranges had climbed 25-fold and had been 5 instances larger than after two doses of the vaccine, in keeping with a report posted on Sunday on medRxiv forward of peer overview. Within the volunteers who had COVID-19 earlier than being vaccinated, antibody ranges after the booster had been 50-fold larger than after their infections. “As a result of these antibody ranges are so sturdy, the booster might doubtlessly give us safety for an extended period than what we noticed for 2 doses of the vaccine,” research coauthor Alexis Demonbreun of Northwestern (NASDAQ:) College Feinberg College of Drugs in Chicago, mentioned in an announcement.

Blood take a look at detects virus publicity with out antibodies

As a result of not everybody produces measurable quantities of COVID-19 antibodies after an infection or vaccination, UK researchers have developed a single blood take a look at that not solely detects antibodies but in addition measures different indicators of an immune system response to the virus. Particularly, it measures T cells, highly effective immune cells that be taught to acknowledge the virus both after encountering it throughout an infection or by way of vaccination. As a part of the brand new take a look at, blood samples are uncovered to replicas of small items of the virus. If the T cells within the blood pattern acknowledge these items, they’re triggered to supply molecules that may be simply measured, such because the inflammatory protein interferon-gamma. “The take a look at may be very delicate and appears to be correct,” mentioned Martin Scurr of Cardiff College College of Drugs, coauthor of a report printed in Immunology. This was true even in sufferers with most cancers, lots of whom don’t produce antibodies in response to vaccination. “The take a look at is simple to make use of and may play a really helpful position” in monitoring antibody and T cell responses to the virus, Scurr mentioned. “Nonetheless, it stays to be decided what stage of antibody and T cell response in opposition to the virus would possibly shield from future an infection and COVID-19.”

Graphic: Vaccines in improvement – https://tmsnrt.rs/3c7R3Bl