Researchers reviewed several studies to see how climate factors like temperature, humidity, and drought might affect infections that can pass from a pregnant person to their baby. The review looked at specific conditions including Group B Streptococcus, Varicella-zoster virus, and HIV.
The findings showed different links for different conditions. Higher temperature and humidity were linked to more Group B Streptococcus. Conversely, cooler or drier conditions were linked to more Varicella-zoster virus. In one specific region, drought-related famine was linked to higher HIV rates in pregnant women.
It is important to note that these results show links, not direct causes. The researchers found that the evidence is currently very weak and inconsistent. There is not enough data yet to know exactly how climate change impacts the transmission of these infections from mother to child. These findings are preliminary and do not change current medical practices.
Common questions
How does temperature affect pregnancy infections?
The review found that higher temperature and humidity were associated with increased colonization of Group B Streptococcus. However, cooler and drier conditions were associated with increased transmission or earlier acquisition of the Varicella-zoster virus. These findings are based on a small number of studies and the overall certainty of the evidence is very low.
Is there a link between drought and HIV in pregnant women?
In a specific study of rural Malawi, drought-associated famine was linked to an increased prevalence of HIV in pregnant women. This suggests that social disruptions and deprivation caused by climate events can impact health outcomes, though more research is needed to confirm these links.
Does this mean climate change causes infections in babies?
No, the study did not find that climate factors directly caused infections in babies. The researchers noted that there is currently insufficient evidence to determine the specific impact of climate change on vertical transmission. The results show associations, not certain causes.
