AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |
Back to Blog
Price of hoelscher lil spike9/1/2023 ![]() Taking a representative average of respiratory activity ( 11), we find that a person typically emits a total number of ~3 × 10 6 particles during a 30-min period (supplementary text, section S1.1). Respiratory particles, including aerosol particles and larger droplets, can carry viruses and are often used to visualize the transmission of airborne viruses ( 4). So how are we to explain these contrasting results and apparent inconsistencies? On the other hand, observational data show that regions or facilities with a higher percentage of the population wearing masks have better control of COVID-19 ( 7– 9). Thus, surgical and similar masks are often considered to be ineffective. Moreover, randomized clinical trials have shown inconsistent or inconclusive results, with some studies reporting only a marginal benefit or no effect of mask use ( 5, 6). Given the large number of particles emitted upon respiration and especially upon sneezing or coughing ( 4), the number of respiratory particles that may penetrate masks is substantial, which is one of the main reasons for doubts about their efficacy in preventing infections. ![]() Compared with N95 or FFP2 respirators, which have very low particle penetration rates (~5%), surgical and similar masks exhibit higher and more variable penetration rates (~30 to 70%) ( 2, 3). The effectiveness of masks, however, is still under debate.
0 Comments
Read More
Leave a Reply. |